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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-Ken6; Zhang, S. X.1
2017-09-28
Source PublicationPHYSICAL REVIEW B
Volume96Issue:9
AbstractPyrochlore 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.
SubtypeArticle
WOS HeadingsScience & Technology ; Physical Sciences
Funding OrganizationIndiana 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) ; NSF-DMR(DMR-1350002) ; NSF-DMR(DMR-1350002) ; NSF(DMR-1157490 ; NSF(DMR-1157490 ; state of Florida ; state of Florida ; CHE-1048613 ; CHE-1048613 ; DMR 1126394) ; DMR 1126394) ; 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) ; NSF-DMR(DMR-1350002) ; NSF-DMR(DMR-1350002) ; NSF(DMR-1157490 ; NSF(DMR-1157490 ; state of Florida ; state of Florida ; CHE-1048613 ; CHE-1048613 ; DMR 1126394) ; DMR 1126394)
DOI10.1103/PhysRevB.96.094437
WOS KeywordSYMMETRY ; PHYSICS
Indexed BySCI
Language英语
Funding OrganizationIndiana 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) ; NSF-DMR(DMR-1350002) ; NSF-DMR(DMR-1350002) ; NSF(DMR-1157490 ; NSF(DMR-1157490 ; state of Florida ; state of Florida ; CHE-1048613 ; CHE-1048613 ; DMR 1126394) ; DMR 1126394) ; 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) ; NSF-DMR(DMR-1350002) ; NSF-DMR(DMR-1350002) ; NSF(DMR-1157490 ; NSF(DMR-1157490 ; state of Florida ; state of Florida ; CHE-1048613 ; CHE-1048613 ; DMR 1126394) ; DMR 1126394)
WOS Research AreaPhysics
WOS SubjectPhysics, Condensed Matter
WOS IDWOS:000411981300002
Citation statistics
Document Type期刊论文
Identifierhttp://ir.hfcas.ac.cn:8080/handle/334002/33719
Collection中科院强磁场科学中心
Affiliation1.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
Recommended Citation
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).
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