Spin pump and probe in lanthanum strontium manganite/platinum bilayers

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Title:	Spin pump and probe in lanthanum strontium manganite/platinum bilayers
Authors:	Luo, GY (Luo, G. Y.) Lin, JG (Lin, J. G.) Chiang, WC (Chiang, Wen-Chung) Chang, CR (Chang, Ching-Ray)
Contributors:	物理系
Date:	2017-07-26
Issue Date:	2018-01-30 15:11:11 (UTC+8)
Abstract:	Ferromagnetic resonance driven spin pumping (FMR-SP) is a novel method to transfer spin current from the ferromagnetic (FM) layer into the adjacent normal metal (NM) layer in an FM/NM bilayer system. Consequently, the spin current could be probed in NM layer via inverse spin Hall effect (ISHE). In spite of numerous ISHE studies on FM/Pt bilayers, La0.7Sr0.3MnO3(LSMO)/Pt system has been less explored and its relevant information about interface property (characterized by spin mixing conductance) and spin-charge conversion efficiency (characterized by spin Hall angle) is a matter of importance for the possible applications of spintronic devices. In this work, the technique of FMR-SP has been applied on two series of LSMO/Pt bilayers with the thickness of each layer being varied. The thickness dependences of ISHE voltage allow to extract the values of spin mixing conductance and spin Hall angle of LSMO/Pt bilayers, which are (1.8 +/- 0.4) x 10(19) m(-2) and (1.2 +/- 0.1) % respectively. In comparison with other FM/Pt systems, LSMO/Pt has comparable spin current density and spin mixing conductance, regardless its distinct electronic structure from other ferromagnetic metals.
Relation:	SCIENTIFIC REPORTS 卷: 7 文獻號碼: 6612
Appears in Collections:	[Department of Physics ] journal articles

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