論文

査読有り
2017年7月

Large Magnetovolume Effect Induced by Embedding Ferromagnetic Clusters into Antiferromagnetic Matrix of Cobaltite Perovskite

ADVANCED MATERIALS
  • Ping Miao
  • ,
  • Xiaohuan Lin
  • ,
  • Akihiro Koda
  • ,
  • Sanghyun Lee
  • ,
  • Yoshihisa Ishikawa
  • ,
  • Shuki Torii
  • ,
  • Masao Yonemura
  • ,
  • Takashi Mochiku
  • ,
  • Hajime Sagayama
  • ,
  • Shinichi Itoh
  • ,
  • Kazutaka Ikeda
  • ,
  • Toshiya Otomo
  • ,
  • Yinxia Wang
  • ,
  • Ryosuke Kadono
  • ,
  • Takashi Kamiyama

29
27
記述言語
英語
掲載種別
研究論文(学術雑誌)
DOI
10.1002/adma.201605991
出版者・発行元
WILEY-V C H VERLAG GMBH

Materials that show negative thermal expansion (NTE) have significant industrial merit because they can be used to fabricate composites whose dimensions remain invariant upon heating. In some materials, NTE is concomitant with the spontaneous magnetization due to the magnetovolume effect (MVE). Here the authors report a new class of MVE material; namely, a layered perovskite PrBaCo2O5.5+x (0 <= x <= 0.41), in which strong NTE [beta approximate to -3.6 x 10(-5) K-1 (90-110 K) at x = 0.24] is triggered by embedding ferromagnetic (F) clusters into the antiferromagnetic (AF) matrix. The strongest MVE is found near the boundary between F and AF phases in the phase diagram, indicating the essential role of competition between the F-clusters and the AF-matrix. Furthermore, the MVE is not limited to the PrBaCo2O5.5+x but is also observed in the NdBaCo2O5.5+x. The present study provides a new approach to obtaining MVE and offers a path to the design of NTE materials.

Web of Science ® 被引用回数 : 15

リンク情報
DOI
https://doi.org/10.1002/adma.201605991
Web of Science
https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=JSTA_CEL&SrcApp=J_Gate_JST&DestLinkType=FullRecord&KeyUT=WOS:000405410700002&DestApp=WOS_CPL
URL
http://orcid.org/0000-0002-0915-2727