Robust pinning of magnetic moments in pyrochlore iridates

doi:10.1103/PhysRevB.96.094437

HFCAS OpenIR > 中科院强磁场科学中心

	Robust pinning of magnetic moments in pyrochlore iridates
	Yang, W. C.1; Zhu, W. K.1,3; Zhou, H. D.2; Ling, L.3 ; Choi, E. S.4; Lee, M.4; Losovyj, Y.5; Lu, Chi-Ken 6; Zhang, S. X.1
	2017-09-28
发表期刊	PHYSICAL REVIEW B
摘要	Pyrochlore iridates A(2)Ir(2)O(7) (A = rare earth elements, Y or Bi) hold great promise for realizing novel electronic and magnetic states owing to the interplay of spin-orbit coupling, electron correlation, and geometrical frustration. A prominent example is the formation of all-in/all-out (AIAO) antiferromagnetic order in the Ir4+ sublattice that comprises corner-sharing tetrahedra. Here we report on an unusualmagnetic phenomenon, namely, a cooling-field-induced shift of magnetic hysteresis loop along the magnetization axis, and its possible origin in pyrochlore iridates with nonmagnetic Ir defects (e.g., Ir3+). In a simple model, we attribute the magnetic hysteresis loop to the formation of ferromagnetic (FM) droplets in the AIAO antiferromagnetic (AFM) background. The weak ferromagnetism originates from canted antiferromagnetic order of the Ir4+ moments surrounding each nonmagnetic Ir defect. The shift of hysteresis loop can be understood quantitatively based on an exchange-bias-like effect in which the moments at the shell of the FM droplets are pinned by the AIAO AFM background via mainly the Heisenberg (J) and Dzyaloshinsky-Moriya (D) interactions. The magnetic pinning is stable and robust against sweeping cycle and sweeping field up to 35 T, which is possibly related to the magnetic octupolar nature of the AIAO order.
文章类型	Article
WOS标题词	Science & Technology ; Physical Sciences
DOI	10.1103/PhysRevB.96.094437
关键词[WOS]	SYMMETRY ; PHYSICS
收录类别	SCI
语种	英语
项目资助者	Indiana University (IU) College of Arts and Sciences ; Indiana University (IU) College of Arts and Sciences ; Indiana University (IU) College of Arts and Sciences ; Indiana University (IU) College of Arts and Sciences ; Indiana University (IU) College of Arts and Sciences ; Indiana University (IU) College of Arts and Sciences ; Indiana University (IU) College of Arts and Sciences ; Indiana University (IU) College of Arts and Sciences ; Taiwan Ministry of Science and Technology(03-2112-M-003-012-MY3) ; Taiwan Ministry of Science and Technology(03-2112-M-003-012-MY3) ; Taiwan Ministry of Science and Technology(03-2112-M-003-012-MY3) ; Taiwan Ministry of Science and Technology(03-2112-M-003-012-MY3) ; Taiwan Ministry of Science and Technology(03-2112-M-003-012-MY3) ; Taiwan Ministry of Science and Technology(03-2112-M-003-012-MY3) ; Taiwan Ministry of Science and Technology(03-2112-M-003-012-MY3) ; Taiwan Ministry of Science and Technology(03-2112-M-003-012-MY3) ; NSF-DMR(DMR-1350002) ; NSF-DMR(DMR-1350002) ; NSF-DMR(DMR-1350002) ; NSF-DMR(DMR-1350002) ; NSF-DMR(DMR-1350002) ; NSF-DMR(DMR-1350002) ; NSF-DMR(DMR-1350002) ; NSF-DMR(DMR-1350002) ; NSF(DMR-1157490 ; NSF(DMR-1157490 ; NSF(DMR-1157490 ; NSF(DMR-1157490 ; NSF(DMR-1157490 ; NSF(DMR-1157490 ; NSF(DMR-1157490 ; NSF(DMR-1157490 ; state of Florida ; state of Florida ; state of Florida ; state of Florida ; state of Florida ; state of Florida ; state of Florida ; state of Florida ; CHE-1048613 ; CHE-1048613 ; CHE-1048613 ; CHE-1048613 ; CHE-1048613 ; CHE-1048613 ; CHE-1048613 ; CHE-1048613 ; DMR 1126394) ; DMR 1126394) ; DMR 1126394) ; DMR 1126394) ; DMR 1126394) ; DMR 1126394) ; DMR 1126394) ; DMR 1126394)
WOS研究方向	Physics
WOS类目	Physics, Condensed Matter
WOS记录号	WOS:000411981300002
引用统计	被引频次：21[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.hfcas.ac.cn:8080/handle/334002/33719
专题	中科院强磁场科学中心
作者单位	1.Indiana Univ, Dept Phys, Bloomington, IN 47405 USA 2.Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA 3.Chinese Acad Sci, High Magnet Field Lab, Hefei 230031, Anhui, Peoples R China 4.Florida State Univ, Natl High Magnet Field Lab, Tallahassee, FL 32310 USA 5.Indiana Univ, Dept Chem, Bloomington, IN 47405 USA 6.Natl Taiwan Normal Univ, Phys Dept, Taipei 11677, Taiwan
推荐引用方式 GB/T 7714	Yang, W. C.,Zhu, W. K.,Zhou, H. D.,et al. Robust pinning of magnetic moments in pyrochlore iridates[J]. PHYSICAL REVIEW B,2017,96(9).
APA	Yang, W. C..,Zhu, W. K..,Zhou, H. D..,Ling, L..,Choi, E. S..,...&Zhang, S. X..(2017).Robust pinning of magnetic moments in pyrochlore iridates.PHYSICAL REVIEW B,96(9).
MLA	Yang, W. C.,et al."Robust pinning of magnetic moments in pyrochlore iridates".PHYSICAL REVIEW B 96.9(2017).