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Zeitschrift für Physikalische Chemie

International journal of research in physical chemistry and chemical physics

Editor-in-Chief: Rademann, Klaus


IMPACT FACTOR 2018: 0.975
5-year IMPACT FACTOR: 1.021

CiteScore 2018: 1.20

SCImago Journal Rank (SJR) 2018: 0.327
Source Normalized Impact per Paper (SNIP) 2018: 0.391

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2196-7156
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Volume 230, Issue 4

Issues

Confirmation of no Structural and Chemical Changes in Curie Temperature Variable Co Ultrathin Films by Electric Field

Yusuke Wakabayashi
  • Corresponding author
  • Division of Materials Physics, Graduate School of Engineering Science, Osaka University, Toyonaka, 560-8531, Japan
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/ Hiromasa Fujii
  • Division of Materials Physics, Graduate School of Engineering Science, Osaka University, Toyonaka, 560-8531, Japan
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/ Tsuyoshi Kimura
  • Division of Materials Physics, Graduate School of Engineering Science, Osaka University, Toyonaka, 560-8531, Japan
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/ Osami Sakata
  • Synchrotron X-ray Station at SPring-8, National Institute for Materials Science (NIMS), Sayo, 679-5148, Japan
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/ Hiroo Tajiri / Tomohiro Koyama / Daichi Chiba
Published Online: 2015-10-23 | DOI: https://doi.org/10.1515/zpch-2015-0648

Abstract

A cobalt ultrathin film, which shows a large change in Curie temperature by an electric field application, has been studied by x-ray reflectometry with applying electric fields. The cobalt film was made by the sputtering method on top of a Pt buffer layer, and capped with a MgO layer. X-ray reflectometry shows that the change in Co thickness caused by the applied voltage up to ±10 V was less than 0.06 Å. The reflectivity signal intensity shows a characteristic kink at the Co K-absorption edge. The spectrum does not show any change with applying voltage. As a result, electric field effects on the structure and chemical states of Co in the Co ultrathin film were found to be minor.

Keywords: X-ray Reflectivity; Thin Film

About the article

Accepted: 2015-09-28

Received: 2015-06-23

Published Online: 2015-10-23

Published in Print: 2016-04-28


Citation Information: Zeitschrift für Physikalische Chemie, Volume 230, Issue 4, Pages 569–575, ISSN (Online) 2196-7156, ISSN (Print) 0942-9352, DOI: https://doi.org/10.1515/zpch-2015-0648.

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