Antiferroquadrupole order and magnetic field induced octupole in CeB6

Physical Review B 85 巻 17 号 174417- 頁 2012 発行
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タイトル ( eng )
Antiferroquadrupole order and magnetic field induced octupole in CeB6
作成者
Yonemura Takumi
Kunimori Keisuke
Iga Fumitoshi
Nagao Tatsuya
Igarashi Jun-ichi
収録物名
Physical Review B
85
17
開始ページ 174417
抄録
We have studied the antiferroquadrupole ordered phase of CeB6 in magnetic fields by resonant x-ray diffraction. By analyzing the significant change in the energy spectrum on reversing the field direction along [1̅ 1 0], we have deduced field dependencies of the antiferro components of magnetic dipole, electric quadrupole, and magnetic octupole moments which are simultaneously induced in the Ce 4f orbital with a propagation vector (1/2,1/2,1/2). The data treatments are based on theoretically calculated spectral functions. The existence of the field-induced octupole is also concluded for other field directions. We also show direct evidence for the formation of a linear-combination-type antiferroquadrupole order parameter in magnetic fields, which is expressed as 〈αOyz+βOzx+γOxy〉 and changes continuously with the field direction (α,β,γ). A possibility of observing the quadrupolar fluctuation is also pointed out.
NDC分類
物理学 [ 420 ]
言語
英語
資源タイプ 学術雑誌論文
出版者
American Physical Society
発行日 2012
権利情報
(c) 2012 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.85.174417
[NCID] AA11187113
[DOI] http://dx.doi.org/10.1103/PhysRevB.85.174417