Magnetic proximity effect in Pt/CoFe2O4 bilayers

被引：42

作者：

Amamou, Walid ^{[1
]}

Pinchuk, Igor V. ^{[2
]}

Trout, Amanda H. ^{[3
,4
]}

Williams, Robert E. A. ^{[3
]}

Antolin, Nikolas ^{[4
]}

Goad, Adam ^{[2
,5
]}

O'Hara, Dante J. ^{[1
]}

Ahmed, Adam S. ^{[2
]}

Windl, Wolfgang ^{[4
]}

McComb, David W. ^{[3
,4
]}

Kawakami, Roland K. ^{[1
,2
]}

机构：

[1] Univ Calif Riverside, Mat Sci & Engn, Riverside, CA 92521 USA

[2] Ohio State Univ, Dept Phys, 174 W 18th Ave, Columbus, OH 43210 USA

[3] Ohio State Univ, Ctr Electron Microscopy & Anal, Columbus, OH 43210 USA

[4] Ohio State Univ, Dept Mat Sci & Engn, 116 W 19Th Ave, Columbus, OH 43210 USA

[5] Univ Maryland Baltimore Cty, Dept Phys, Baltimore, MD 21250 USA

来源：

PHYSICAL REVIEW MATERIALS | 2018年 / 2卷 / 01期

关键词：

FIELD;

D O I：

10.1103/PhysRevMaterials.2.011401

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We observe the magnetic proximity effect (MPE) in Pt/CoFe2O4 bilayers grown by molecular beam epitaxy. This is revealed through angle-dependent magnetoresistance measurements at 5K, which isolate the contributions of induced ferromagnetism (i.e., anisotropic magnetoresistance) and the spin Hall effect (i.e., the spin Hall magnetoresistance) in the Pt layer. The strong evidence for induced ferromagnetism in Pt via the anisotropic magnetoresistance is supported further by density functional theory calculations and various control measurements including the insertion of a Cu spacer layer to suppress the induced ferromagnetism. In addition, anomalous Hall effect measurements show an out-of-plane magnetic hysteresis loop of the induced ferromagnetic phase with larger coercivity and larger remanence than the bulk CoFe2O4. By demonstrating the MPE in Pt/CoFe2O4, these results establish the spinel ferrite family as a promising material for the MPE and spin manipulation via proximity exchange fields.

引用

页数：5

共 30 条

[1]

[Anonymous], THESIS

[2] Nanoscale Magnetization Reversal Caused by Electric Field-Induced Ion Migration and Redistribution in Cobalt Ferrite Thin Films [J].

Chen, Xinxin ;

Zhu, Xiaojian ;

Xiao, Wen ;

Liu, Gang ;

Feng, Yuan Ping ;

Ding, Jun ;

Li, Run-Wei .

ACS NANO, 2015, 9 (04) :4210-4218

[3] Theory of spin Hall magnetoresistance [J].

Chen, Yan-Ting ;

Takahashi, Saburo ;

Nakayama, Hiroyasu ;

Althammer, Matthias ;

Goennenwein, Sebastian T. B. ;

Saitoh, Eiji ;

Bauer, Gerrit E. W. .

PHYSICAL REVIEW B, 2013, 87 (14)

[4] Spin transport in proximity-induced ferromagnetic graphene [J].

Haugen, Havard ;

Huertas-Hernando, Daniel ;

Brataas, Arne .

PHYSICAL REVIEW B, 2008, 77 (11)

[5] Structural tuning of the magnetic behavior in spinel-structure ferrite thin films [J].

Hu, G ;

Choi, JH ;

Eom, CB ;

Harris, VG ;

Suzuki, Y .

PHYSICAL REVIEW B, 2000, 62 (02) :R779-R782

[6] Spin Hall Magnetoresistance as a Probe for Surface Magnetization in Pt/CoFe2O4 Bilayers [J].

Isasa, Miren ;

Velez, Saul ;

Sagasta, Edurne ;

Bedoya-Pinto, Amilcar ;

Dix, Nico ;

Sanchez, Florencio ;

Hueso, Luis E. ;

Fontcuberta, Josep ;

Casanova, Felix .

PHYSICAL REVIEW APPLIED, 2016, 6 (03)

[7] Spin Hall magnetoresistance at Pt/CoFe2O4 interfaces and texture effects [J].

Isasa, Miren ;

Bedoya-Pinto, Amilcar ;

Velez, Saul ;

Golmar, Federico ;

Sanchez, Florencio ;

Hueso, Luis E. ;

Fontcuberta, Josep ;

Casanova, Felix .

APPLIED PHYSICS LETTERS, 2014, 105 (14)

[8]

Jean-Baptiste M., 2013, J PHYS D APPL PHYS, V46, DOI [10.1088/0022-3727/46/14/143001, DOI 10.1088/0022-3727/46/14/143001]

[9] Efficient iterative schemes for ab initio total-energy calculations using a plane-wave basis set [J].

Kresse, G ;

Furthmuller, J .

PHYSICAL REVIEW B, 1996, 54 (16) :11169-11186

[10] Static Magnetic Proximity Effect in Pt/NiFe2O4 and Pt/Fe Bilayers Investigated by X-Ray Resonant Magnetic Reflectivity [J].

Kuschel, T. ;

Klewe, C. ;

Schmalhorst, J. -M. ;

Bertram, F. ;

Kuschel, O. ;

Schemme, T. ;

Wollschlaeger, J. ;

Francoual, S. ;

Strempfer, J. ;

Gupta, A. ;

Meinert, M. ;

Goetz, G. ;

Meier, D. ;

Reiss, G. .

PHYSICAL REVIEW LETTERS, 2015, 115 (09)

← 1 2 3 →