title: Electric Control of the Hall effect in Pt/Bi0.9La0.1FeO3 bilayers.
abstract: Platinum metal, being nonmagnetic and with a strong spin-orbit coupling interaction, has been deposited on weak ferromagnetic Bi0.9La0.1FeO3 thin films. The Hall effect is studied as a function of the polarization direction of multiferroic Bi0.9La0.1FeO3 thin films, as well as magnetic field (H) and temperature (T). For the two polarization directions, besides the obvious difference of the anomalous Hall resistance RAH, it increases sharply with decreasing temperature, and even changes sign, thus violating the conventional expression. This observations indicate local magnetic moments in Pt caused by the local electric fields at the interface of Bi0.9La0.1FeO3 films. Also, possible proximity effects and induced magnetic ordering in Pt on weak ferromagnetic Bi0.9La0.1FeO3 thin films of both upward and downward polarization states may exist and their contribution to the spin-related measurements should not be neglected.
authors.affiliation: School of Metallurgy and Materials Engineering, Chongqing University of Science and Technology, Chongqing, 401331, China.
authors.forename: Rongli
authors.initials: R
authors.lastname: Gao
authors.affiliation: School of Metallurgy and Materials Engineering, Chongqing University of Science and Technology, Chongqing, 401331, China.
authors.forename: Chunlin
authors.initials: C
authors.lastname: Fu
authors.affiliation: School of Metallurgy and Materials Engineering, Chongqing University of Science and Technology, Chongqing, 401331, China.
authors.forename: Wei
authors.initials: W
authors.lastname: Cai
authors.affiliation: School of Metallurgy and Materials Engineering, Chongqing University of Science and Technology, Chongqing, 401331, China.
authors.forename: Gang
authors.initials: G
authors.lastname: Chen
authors.affiliation: School of Metallurgy and Materials Engineering, Chongqing University of Science and Technology, Chongqing, 401331, China.
authors.forename: Xiaoling
authors.initials: X
authors.lastname: Deng
authors.affiliation: Beijing National Laboratory for Condensed Matter Physics and Institute of Physics, Chinese Academy of Science, Beijing 100190, China.
authors.forename: Hongrui
authors.initials: H
authors.lastname: Zhang
authors.affiliation: Beijing National Laboratory for Condensed Matter Physics and Institute of Physics, Chinese Academy of Science, Beijing 100190, China.
authors.forename: Jirong
authors.initials: J
authors.lastname: Sun
authors.affiliation: Beijing National Laboratory for Condensed Matter Physics and Institute of Physics, Chinese Academy of Science, Beijing 100190, China.
authors.forename: Baogen
authors.initials: B
authors.lastname: Shen
references.citation: Science. 2004 Mar 12;303(5664):1647-9
references.pmid: 15016994
references.citation: Phys Rev Lett. 2013 May 17;110(20):206601
references.pmid: 25167435
references.citation: Science. 2005 Sep 23;309(5743):2004-5
references.pmid: 16179462
references.citation: Science. 2003 Mar 14;299(5613):1719-22
references.pmid: 12637741
references.citation: Phys Rev Lett. 2012 Sep 7;109(10):107204
references.pmid: 23005323
references.citation: Phys Rev Lett. 2009 Jul 31;103(5):057204
references.pmid: 19792531
references.citation: Phys Rev Lett. 2013 Jan 4;110(1):016805
references.pmid: 23383824
references.citation: Phys Rev Lett. 2013 Apr 5;110(14):147207
references.pmid: 25167034
references.citation: Phys Rev Lett. 2011 Sep 30;107(14):147602
references.pmid: 22107234
references.citation: Science. 2003 Oct 3;302(5642):92-5
references.pmid: 14526076
references.citation: Nat Mater. 2010 Nov;9(11):894-7
references.pmid: 20871606
references.citation: Phys Rev Lett. 2013 Nov 22;111(21):216803
references.pmid: 24313512