Anisotropic magnetoresistance across Verwey transition in charge ordered Fe3O4 epitaxial films

Handle URI:
http://hdl.handle.net/10754/626746
Title:
Anisotropic magnetoresistance across Verwey transition in charge ordered Fe3O4 epitaxial films
Authors:
Liu, Xiang; Mi, Wenbo; Zhang, Qiang ( 0000-0001-8519-5158 ) ; Zhang, Xixiang ( 0000-0002-3478-6414 )
Abstract:
The anisotropic magnetoresistance (AMR) near the Verwey temperature (T-V) is investigated in charge ordered Fe3O4 epitaxial films. When the temperature continuously decreases below T-V, the symmetry of AMR in Fe3O4(100) film evolves from twofold to fourfold at a magnetic field of 50 kOe, where the magnetic field is parallel to the film surface, whereas AMR in Fe3O4(111) film maintains twofold symmetry. By analyzing AMR below T-V, it is found that the Verwey transition contains two steps, including a fast charge ordering process and a continuous formation process of trimeron, which is comfirmed by the temperature-dependent Raman spectra. Just below T-V, the twofold AMR in Fe3O4(100) film originates from uniaxial magnetic anisotropy. The fourfold AMR at a lower temperature can be ascribed to the in-plane trimerons. By comparing the AMR in the films with two orientations, it is found that the trimeron shows a smaller resistivity in a parallel magnetic field. The field-dependent AMR results show that the trimeron-sensitive field has a minimum threshold of about 2 kOe.
KAUST Department:
Physical Sciences and Engineering (PSE) Division; Materials Science and Engineering Program
Citation:
Liu X, Mi W, Zhang Q, Zhang X (2017) Anisotropic magnetoresistance across Verwey transition in charge ordered Fe3O4 epitaxial films. Physical Review B 96. Available: http://dx.doi.org/10.1103/PhysRevB.96.214434.
Publisher:
American Physical Society (APS)
Journal:
Physical Review B
Issue Date:
26-Dec-2017
DOI:
10.1103/PhysRevB.96.214434
Type:
Article
ISSN:
2469-9950; 2469-9969
Sponsors:
This work is supported by the National Natural Science Foundation of China (Grants No. 51671142 and No. U1632152) and the Key Project of the Natural Science Foundation of Tianjin (Grant No. 16JCZDJC37300).
Additional Links:
https://journals.aps.org/prb/abstract/10.1103/PhysRevB.96.214434
Appears in Collections:
Articles; Physical Sciences and Engineering (PSE) Division; Materials Science and Engineering Program

Full metadata record

DC FieldValue Language
dc.contributor.authorLiu, Xiangen
dc.contributor.authorMi, Wenboen
dc.contributor.authorZhang, Qiangen
dc.contributor.authorZhang, Xixiangen
dc.date.accessioned2018-01-15T06:10:39Z-
dc.date.available2018-01-15T06:10:39Z-
dc.date.issued2017-12-26en
dc.identifier.citationLiu X, Mi W, Zhang Q, Zhang X (2017) Anisotropic magnetoresistance across Verwey transition in charge ordered Fe3O4 epitaxial films. Physical Review B 96. Available: http://dx.doi.org/10.1103/PhysRevB.96.214434.en
dc.identifier.issn2469-9950en
dc.identifier.issn2469-9969en
dc.identifier.doi10.1103/PhysRevB.96.214434en
dc.identifier.urihttp://hdl.handle.net/10754/626746-
dc.description.abstractThe anisotropic magnetoresistance (AMR) near the Verwey temperature (T-V) is investigated in charge ordered Fe3O4 epitaxial films. When the temperature continuously decreases below T-V, the symmetry of AMR in Fe3O4(100) film evolves from twofold to fourfold at a magnetic field of 50 kOe, where the magnetic field is parallel to the film surface, whereas AMR in Fe3O4(111) film maintains twofold symmetry. By analyzing AMR below T-V, it is found that the Verwey transition contains two steps, including a fast charge ordering process and a continuous formation process of trimeron, which is comfirmed by the temperature-dependent Raman spectra. Just below T-V, the twofold AMR in Fe3O4(100) film originates from uniaxial magnetic anisotropy. The fourfold AMR at a lower temperature can be ascribed to the in-plane trimerons. By comparing the AMR in the films with two orientations, it is found that the trimeron shows a smaller resistivity in a parallel magnetic field. The field-dependent AMR results show that the trimeron-sensitive field has a minimum threshold of about 2 kOe.en
dc.description.sponsorshipThis work is supported by the National Natural Science Foundation of China (Grants No. 51671142 and No. U1632152) and the Key Project of the Natural Science Foundation of Tianjin (Grant No. 16JCZDJC37300).en
dc.publisherAmerican Physical Society (APS)en
dc.relation.urlhttps://journals.aps.org/prb/abstract/10.1103/PhysRevB.96.214434en
dc.rightsArchived with thanks to Physical Review Ben
dc.titleAnisotropic magnetoresistance across Verwey transition in charge ordered Fe3O4 epitaxial filmsen
dc.typeArticleen
dc.contributor.departmentPhysical Sciences and Engineering (PSE) Divisionen
dc.contributor.departmentMaterials Science and Engineering Programen
dc.identifier.journalPhysical Review Ben
dc.eprint.versionPublisher's Version/PDFen
dc.contributor.institutionTianjin Key Laboratory of Low Dimensional Materials Physics and Preparation Technology, School of Science, Tianjin University, Tianjin, 300354, , Chinaen
kaust.authorZhang, Qiangen
kaust.authorZhang, Xixiangen
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