journal: Zeitschrift für Naturforschung A

Impact Factor: 1.712

Published since February 20, 1946

Zeitschrift für Naturforschung A

A Journal of Physical Sciences

ISSN: 1865-7109

Editor-in-chief: Martin Holthaus

Edited by: Gernot Alber, Martin Holthaus, Claus Kiefer, Klaus Morawetz, Jürgen Schnack

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About this journal

Objective
A Journal of Physical Sciences: Zeitschrift für Naturforschung A (ZNA) is an international scientific journal which publishes original research papers from all areas of experimental and theoretical physics. Authors are encouraged to pay particular attention to a clear exposition of their respective subject, addressing a wide readership. In accordance with the name of our journal, which means “Journal for Natural Sciences”, manuscripts submitted to ZNA should have a tangible connection to actual physical phenomena. In particular, we welcome experiment-oriented contributions.

Manuscripts considered for publication in A Journal of Physical Sciences: Zeitschrift für Naturforschung A undergo high-level refereeing. Mere formal correctness of a paper is not sufficient for its acceptance. Moreover, articles reporting a merely marginal extension of already existing knowledge are considered unsatisfactory. Instead, the key quality a publication in A Journal of Physical Sciences: Zeitschrift für Naturforschung A should possess is that it makes a genuine contribution to the advancement of its topic.

Topics

Atomic, Molecular & Chemical Physics
Dynamical Systems & Nonlinear Phenomena
Gravitation & Cosmology
Hydrodynamics
Quantum Theory
Solid State Physics & Materials Science
Thermodynamics & Statistical Physics

Article formats
Original research articles, research notes, letters and review articles from all areas of theoretical and experimental physics

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Your Benefits

Zeitschrift für Naturforschung A – A Journal of Physical Sciences is proud to announce a new feature, the Editor’s Choice free access article. To download the featured article free of charge, please click the link below.

Vol. 76, Iss. 12: Spin coherent states, Bell states, spin Hamilton operators, entanglement, Husimi distribution, uncertainty relation and Bell inequality by Dylan Durieux and Willi-Hans Steeb

Vol. 76, Iss. 12: Mathieu-state reordering in periodic thermodynamics by Onno R. Diermann

Vol. 76, Iss. 11: Exact Beltrami flows in a spherical shell by Oleg Bogoyavlenskij

Vol. 76, Iss. 9: Accuracy of the typicality approach using Chebyshev polynomials by Henrik Schlüter, Florian Gayk, Heinz-Jürgen Schmidt, Andreas Honecker and Jürgen Schnack

Vol. 76, Iss. 8: Stochastic thermodynamics of a finite quantum system coupled to a heat bath by Heinz-Jürgen Schmidt, Jürgen Schnack and Jochen Gemmer

Vol. 76, Iss. 3: Interaction of waves in one-dimensional dusty gas flow by Pooja Gupta, Rahul Kumar Chaturvedi and L. P. Singh

Vol. 75, Iss. 7: Admissibility conditions for Riemann data in shallow water theory by Martin O. Paulsen and Henrik Kalisch

Vol. 75, Iss. 5: Special Issue: Physics of Non-Equilibrium Systems/ Issue Editors: Martin Holthaus and Andreas Engel

Vol. 75, Iss. 2: Quantum-Phase-Field: From de Broglie-Bohm Double-Solution Program to Doublon Networks by J. Kundin and I. Steinbach

Vol. 74, Iss. 8: Special Issue: Trends an Perspectives in Engery Research/ Issue Editors: Martin Holthaus and Sascha Schäfer

Vol. 72, Iss. 2: Special Issue: Heat Transfer and Heat Conduction on the Nanoscale / Guest Editors: Svend-Age Biehs, Philippe Ben-Abdallah, Achim Kittel

Vol. 71, Iss. 10: Focus Section: Emergence in Driven Solid-State and Cold-Atom Systems / Guest Editors: Ludwig Mathey, Junichi Okamoto

History

The "Zeitschrift für Naturforschung A - A Journal of Physical Sciences" (ZNA) is an international scientific journal that publishes original research papers from all areas of experimental and theoretical physics. The journal has had a tradition of excellence since its first issue in early 1946.

History of ZNA: A Modern Journal with Tradition

Free access to virtual issue: seminal papers of eminent physicist published throughout the journal’s history

The "Zeitschrift für Naturforschung" – translated literally: Journal for Research in Natural Sciences – was founded by Alfred Klemm together with Hans Friedrich-Freksa in 1945, providing a badly needed functioning means of professional communication for scientists in postwar Germany.

In this tradition, ZNA is serving the international scientific community still today as an efficient, up-to-date communication platform which covers all areas of experimental and theoretical physics, combining rigorous publication standards with high visibility.

Please have a look at the comprehensive history of ZNA in the document "About this Journal".

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Online Submission of Manuscripts

Volume 78 Issue 3

March 2023

Publicly Available March 7, 2023

Frontmatter

Page range: i-iii

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General

January 17, 2023

The uniqueness of the solution of a mixed problem for three-dimensional hyperbolic equations with type and order degeneracy property

Serik Aldashev, Zaure Kanapyanova

Page range: 209-217

Abstract

The relevance of the stated subject is conditioned upon the presence of a real possibility to simulate vibrations of elastic membranes in space according to the Hamilton principle using degenerate three-dimensional hyperbolic equations, which is of particular practical importance from the standpoint of the prospects for mathematical modelling of the heat propagation process in oscillating elastic membranes. The purpose of this paper is to study the sequence of the procedure for mathematical modelling of heat propagation in oscillating elastic membranes which is leading to degenerate three-dimensional hyperbolic equations. The methodological approach of this study is based on a combination of theoretical study of the possibilities of constructing mathematical models of heat propagation in oscillating elastic membranes with the practical application of methods for constructing three-dimensional hyperbolic equations with type and order degeneracy to find a single solution to a mixed problem. In the course of this study, the results were presented in the form of a mathematical proof of the possibility of obtaining a single solution to a mixed problem for three-dimensional hyperbolic equations with type and order degeneracy. The results obtained in this study and the conclusions formulated on their basis are of significant practical importance for developers of methods of mathematical modelling of heat propagation processes in oscillating artificial membranes, which is of key importance from the standpoint of prospects for improving methods of mathematical modelling of processes occurring in technical devices used in various fields of modern industries.

Hydrodynamics

January 11, 2023

General three-dimensional equilibrium for stationary inviscid fluids in the presence of a gravitational potential

Eman T. Hussain, Doaa A. Ibrahim, Omar H. El-Kalaawy, Salah M. Moawad

Page range: 219-232

Abstract

In this paper, we study the properties of the general three-dimensional equilibrium solutions for steady-state equations of inviscid fluids. Incompressible, homogeneous, inhomogeneous and compressible flows motion in a gravitational potential are considered. General three-dimensional formulas for the gas pressure and the gravitational potential are obtained. For incompressible flows, the vector and scalar potentials of the velocity field are used to derive general formulas for general three-dimensional solutions. To verify our results, some examples are presented. For compressible flows, a class of three-dimensional solutions is constructed.

February 8, 2023

Effects of stretching velocity on double fractional Jeffreys fluids with rheological synergistic heat conductivity

Shengna Liu, Weidong Yang, Yiming Ding, Liancun Zheng

Page range: 233-247

Abstract

Double fractional Jeffreys fluids are widely used in production and life. In this paper, the effects of stretching velocity on the flow and heat transfer of double fractional Jeffreys fluid are studied. Three types of stretching velocity are considered, i.e., (i) uniform velocity; (ii) acceleration; and (iii) deceleration. The rheological synergistic thermal conductivity model introduced to the energy equation is formulated based on experiments. The governing equations are solved by using a combination of the finite difference technique and the L1 algorithm. Results show that there is an inflection point on each velocity profile which divides the velocity field into two sections, convex (the elasticity plays a primary effect) and concave (the viscosity plays a primary effect). As the stretching velocity parameter increases, the thickness of the region where the elasticity plays a major role does not change in case (i), however, it reduces in case (ii) and grows in case (iii). We also found that, compared with uniform stretching, accelerated stretching can lead to higher heat transfer, while decelerated stretching causes less heat transfer. And for uniform velocity stretching, the stretching velocity parameter has little effect on the temperature field. In the case of accelerated stretching, increasing the stretching velocity parameter enhances heat transfer, however, for decelerated stretching, it weakens heat transfer. These results are instructive for industrial design.

Solid State Physics & Materials Science

January 20, 2023

Ultra-sensitive one-dimensional phononic crystals temperature sensor: theoretical optimization

Farhad Javanpour Heravi, Hussein A. Elsayed, Walied Sabra, Ahmed Mehaney

Page range: 249-261

Abstract

The present study intends to solve the problem of low-temperature sensitivity of most conventional period materials. A solid/solid one-dimensional phononic crystal design is proposed as a pragmatic thermal sensor. Here, each unit cell of the proposed phononic crystal sensor is designed from epoxy and concrete. In this structure, irregularity in layers’ arrangement results in the generation of resonant peaks at the transmission spectrum. The irregularity is introduced to the system by stacking two mirror phononic crystals to form a whole symmetric phononic crystal design. Thermal variations lead to significant changes in Young’s modulus of concrete and epoxy; consequently, transmission spectra and local resonant peaks are shifted as well. Firstly, the band gap changes, and sensor performance were investigated under different conditions such as the incident angle and the number of unit cells to get the optimum parameters. Meanwhile, promising results have been obtained, with increasing the incident angle, the sensitivity increases exponentially till it reaches 1.5 × 10 3 Hz/°C at an incident angle = 18°. Also, with increasing the temperature from 25 to 100 °C, the sensitivity increases dramatically from 188.8 to 362.4 Hz/°C, respectively. In addition, the largest value of Q-factor was investigated at periodicity number = 4. Moreover, in this regard, the Q-factor has the value of 3708 at 25 °C and it reaches to the value of 896.6 at 100 °C. That is to say, the obtained results may be useful in designing thermal sensors with a high sensitivity value.

December 21, 2022

Blue-green luminescence properties and charge compensation of Ca₉MgLi(PO₄)₇ doped with Tb³⁺ and alkali metal ions

Qili Zhang, Ruting Lou, Zheng Liu, Wenlin Feng

Page range: 263-269

Abstract

Ca 9 MgLi(PO 4 ) 7 : 4%Tb 3+ , 4%R + (R = Li, Na, K) phosphors were synthesized by a solid-state reaction method. The crystal structure, morphology, composition and luminescent properties of as-prepared samples were characterized by X-ray diffraction (XRD), high-resolution transmission electron microscopy (HRTEM), energy dispersive spectrometer (EDS), high-angle annular dark field (HAADF) and spectroscopy technique. The effect of a small concentration of charge compensators like Li + , Na + , K + on Ca 9 MgLi(PO 4 ) 7 : Tb 3+ phosphor has also investigated. Ca 9 MgLi(PO 4 ) 7 : Tb 3+ , R + (R = Li, Na, K) exhibit superior blue-green luminescence around 5 D 4 → 7 F 5 (543 nm) to Ca 9 MgLi(PO 4 ) 7 : Tb 3+ and can be effectively excited by 370 nm light, which implies that efficient charge compensation can promote the emitting of Tb 3+ in Ca 9 MgLi(PO 4 ) 7 . The CIE coordinates and decay lifetimes of typical samples were also studied. The Ca 9 MgLi(PO 4 ) 7 : Tb 3+ , R + (R = Li, Na, K) have promising application as a blue-green phosphor for near-ultraviolet chip excited white LEDs.

December 2, 2023

Research of the thermal effect on the Fe–Cr–Al alloy foil in the initial state and with the deposited secondary support

Bolatbek Khussain, Alexandr Brodskiy, Alexandr Sass, Bagdat Teltayev, Kenjegul Rakhmetova

Page range: 271-280

Abstract

The purpose of this work is to study the influence of thermal effect on the surface morphology of the Fe–Cr–Al (Kh15Yu5) alloy foil and the elemental composition of the surface layers. Also, studies have been carried out on the physicochemical characteristics of the primary support with the deposited secondary support in the initial state and within the temperature range from 25 to 900 °C. The research was carried out on a JSM 6610 LV, JEOL scanning electron microscope with an installed INCA Energy 450 energy-dispersive microanalysis system. Before depositing secondary support (aluminum oxide), for a stronger adhesion to the foil metal, the foil surface was pretreated with a phosphating solution. It was found that during heating up the elemental composition of the surface layer of the Kh15Yu5-alloy foil does not remain constant and depends on the mode of thermal effect. This implies the possibility of changing the adhesion and adsorption properties of the foil surface, as well as the need to take this into account when depositing secondary support and an active phase to the foil. Studies have shown that the applied methods for phosphatizing and depositing secondary support to the foil surface make it possible to obtain a quite resistant coating. No peeling of the secondary support from the foil surface is observed during high-temperature treatment in the air.

February 2, 2023

Effect of sintering temperature on re-distribution of cations, electronic structure and tuning of optical band gap and ferromagnetism in Mn_0.1Co_0.9Fe₂O₄ spinel ferrites

Nandagopal Abinaya, Muthaian Charles Robert, Kumaravel Kaviyapandimeena, Paul Chinnappan Christuraj

Page range: 281-295

Abstract

Manganese-ion doped cobalt ferrite with the composition Mn 0.1 Co 0.9 Fe 2 O 4 was synthesized by the self-combustion method and sintered at 800 °C, 900 °C and 1000 °C, represented as MCF-800, MCF-900 and MCF-1000, respectively. X-ray methods observed a single-phase cubic spinel formation. XPS analysis revealed the distribution of Mn 3+ and Mn 2+ ions in the tetrahedral A and octahedral B sites. Optical absorption studies confirmed an energy bandgap of 1.2505 eV for the sample MCF-1000, corresponding to near IR absorption useful for catalytic and water-splitting applications. The VSM measurements revealed a maximum magnetization ( Ms ) of 79.612 emu/g for the sample MCF-1000. The maximum entropy method (MEM) electron density distribution studies revealed different strengths of electron density for the cation tetrahedral site A and octahedral site B depending on sintering temperature variation. The sample sintered at 1000 °C with the A–O covalent and B–O ionic bonds with mid-bond densities of 1.903 e/Å 3 and 0.381 e/Å 3 may be useful for ferromagnetic applications. The magnetic, optical, and electronic analyses confirm that the sample MCF-1000 may be best suited for low-cost catalytic, water splitting and ferrite applications.

February 3, 2023

Analyzing pH-dependent structural characteristics and optical transmittance of titanium dioxide

Nadia Anwar, Muhammad Aamir Iqbal, Muqarrab Ahmed, Bushra Anwar, Iqra Abbas, Syeda Tehreem Iqbal, Fouzia Anwar, Nosheen Mushahid, Rey Y. Capangpangan, Arnold C. Alguno

Page range: 297-303

Abstract

The use of titanium dioxide (also known as titania) in solar cells, biomaterials, and photocatalytic processes has generated an ever-increasing amount of interest. Titania is widely used in a variety of applications because it is nanocrystalline, chemically stable, has a high refractive index, is mechanically hard, and transmits visible light well. In this work, titania nanoparticles were formed via sol–gel synthesis, wherein the effect of varying pH values such as 3, 5, 7, 9, and 11 has been investigated on the synthesized nanoparticles by studying their structural characteristics and analyzing their optical transmittance. Structural analysis of the synthesized TiO 2 shows formation of the brookite phase at all pH values under as-synthesized conditions. Moreover, structural parameters including crystallite size, dislocation density, and unit cell volume were also calculated. Cell volume was calculated at various pH levels and measured between 255.7 and 257.2 Å 3 . Optical analysis shows a transmission increase with a pH increase, and maximum transmission has been observed above 80% for a pH value of 11.

Ahead of Print / Just Accepted

Ahead of Print / Just Accepted

Volume 78 (2023)

Volume 77 (2022)

Volume 76 (2021)

Volume 75 (2020)

Volume 74 (2019)

Volume 73 (2018)

Volume 72 (2017)

Volume 71 (2016)

Volume 70 (2015)

Volume 69 (2014)

Volume 68 (2013)

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5-year Impact Factor	1.319
Cite Score	2.7
Impact Factor	1.712
Journal Citation Indicator	0.31
SCImago Journal Rank	0.313
Source Normalized Impact per Paper	0.568

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Editorial

Editor in Chief
Martin Holthaus (Oldenburg)

Honorary Editor
Siegfried Großmann (Marburg)

Editors
Gernot Alber (Darmstadt)
Claus Kiefer (Köln)
Klaus Morawetz (Münster)
Jürgen Schnack (Bielefeld)

Advisory Board
Ulrich Eckern (Augsburg)
Condensed Matter Theory
Theory of Superconductivity and Superfluid Helium
Unconventional Superconductors near Interfaces
Quantum Mechanics

Thomas Elze (Pisa)
Quantum-classical Hybrid Systems
Quantum Decoherence
QCD Transport Theory
Quark-gluon Plasma
Statistical Mechanics

Jan Honolka (Prag)
Nano-Magnetism and Magnetism
Physics of Surfaces and Surface Science
X-ray Spectroscopy

Albrecht Klemm (Bonn)
Quantum Field Theory
Mathematical Physics
Gravity, String Theory

Thorsten Klüner (Oldenburg)
Quantum Chemistry
Density Functional Theory (DFT)
Development of Embedding Methods
Dissipative Quantum Dynamics
Electronically Excited States
Photochemistry on Surfaces

Shijun Liao (Shanghai)
Nonlinear Mechanics
Computational Fluid Dynamics
Ocean Engineering

Stefan Lochbrunner (Rostock)
Atomic and Molecular Physics
Dynamics of Molecular Systems

Detlef Lohse (Twente)
Hydrodynamics

Willi-Hans Steeb (Johannesburg)
Dynamical Systems
Quantum Information Theory

Aneta Stefanovska (Lancaster)
Complex Systems
Biological, Cardiovascular, Neural Systems
Time Series Analysis
Coupled Oscillators, Synchronization

Weigang Sun (Hangzhou)
Applied Mathematics
Differential Equations
Nonlinear Systems
Nonlinear Control

Martin Zirnbauer (Köln)
Theoretical Physics (Mathematical Foundations)
Field Theory of Disordered and Mesoscopic Systems
Topological Quantum Matter

Editorial Office
Ulrike Kitzing, De Gruyter, Genthiner Straße 13, 10785 Berlin, Germany
Email: zna [at] degruyter.com

(Deutsch)

Online ISSN: 1865-7109
Print ISSN: 0932-0784
Type: Journal
Language: English
Publisher: De Gruyter
First published: February 20, 1946
Publication Frequency: 12 Issues per Year
Audience: Theoretical and experimental physicists, anyone interested in journal's topics

Zeitschrift für Naturforschung A

A Journal of Physical Sciences

Frontmatter

The uniqueness of the solution of a mixed problem for three-dimensional hyperbolic equations with type and order degeneracy property

Abstract

General three-dimensional equilibrium for stationary inviscid fluids in the presence of a gravitational potential

Abstract

Effects of stretching velocity on double fractional Jeffreys fluids with rheological synergistic heat conductivity

Abstract

Ultra-sensitive one-dimensional phononic crystals temperature sensor: theoretical optimization

Abstract

Blue-green luminescence properties and charge compensation of Ca9MgLi(PO4)7 doped with Tb3+ and alkali metal ions

Abstract

Research of the thermal effect on the Fe–Cr–Al alloy foil in the initial state and with the deposited secondary support

Abstract

Effect of sintering temperature on re-distribution of cations, electronic structure and tuning of optical band gap and ferromagnetism in Mn0.1Co0.9Fe2O4 spinel ferrites

Abstract

Analyzing pH-dependent structural characteristics and optical transmittance of titanium dioxide

Abstract

Blue-green luminescence properties and charge compensation of Ca₉MgLi(PO₄)₇ doped with Tb³⁺ and alkali metal ions

Effect of sintering temperature on re-distribution of cations, electronic structure and tuning of optical band gap and ferromagnetism in Mn_0.1Co_0.9Fe₂O₄ spinel ferrites