Direct evidence of ferromagnetism without net magnetization observed by x-ray magnetic circular dichroism

Physical Review B - Condensed Matter and Materials Physics 70 巻 13 号 134418-1-134418-5 頁 2004-10-26 発行
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タイトル ( eng )
Direct evidence of ferromagnetism without net magnetization observed by x-ray magnetic circular dichroism
作成者
Qiao Shan
Adachi Hiromichi
Iori Kazuyuki
Xie Tian
Muro Takayuki
Imada Shin
Suga Shigemasa
収録物名
Physical Review B - Condensed Matter and Materials Physics
70
13
開始ページ 134418-1
終了ページ 134418-5
抄録
We have performed x-ray magnetic circular dichroism experiments to study the cancellation of spin and orbital magnetic moments in (Sm, Gd)Al2, a ferromagnet without net magnetization at a certain compensation temperature, Tcomp. We verified the existence of long-range order for both spin and orbital magnetic moments at Tcomp. The spin and orbital magnetic moments of the Sm ion are found always antiparallel coupled and the magnitude of its orbital magnetic moment is always larger than that of spin one, so the cancellation of magnetic moments cannot be achieved by only Sm 4f electrons. We show that the addition of spin magnetic moments of Gd ions and conduction electrons, which are ferromagnetically coupled with the spin magnetic moment of Sm ions, cancels out the surplus orbital magnetic moments in Sm ions completely and results in the zero magnetization at Tcomp. All our experimental results can be reproduced well by atomic multiplet calculations.
言語
英語
資源タイプ 学術雑誌論文
出版者
American Physical Society
発行日 2004-10-26
権利情報
Copyright (c) 2004 The American Physical Society.
出版タイプ Version of Record(出版社版。早期公開を含む)
アクセス権 オープンアクセス
収録物識別子
[ISSN] 1098-0121
[DOI] 10.1103/PhysRevB.70.134418
[NCID] AA11187113
[DOI] http://dx.doi.org/10.1103/PhysRevB.70.134418