Influence of damping constant on inverse spin hall voltage of La0.7Sr0.3MnO3(x)/platinum bilayers

Luo, G. Y.; Chang, Ching‐Ray; Lin, J. G.

doi:10.1063/1.4863485

Cited by 25 publications

(17 citation statements)

References 33 publications

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“…Our results show that the damping constant of LSMO/Pt(5.5 nm) (α eff = 5.93 × 10 −3 ) is larger than LSMO(20 nm) (α eff = 1.57 × 10 −3 ). In comparison with the previous report on LSMO(20 nm)/Pt(5.5 nm), 14 the value of damping constant obtained from this work is 20 % lower. Considering the difference in the method of calulation in these two works, it is suggested that the value determined with the frequency dependence of resonance field (this work) should be more accurate than that with single frequence (Ref.…”

Section: Resultsmentioning

confidence: 52%

“…To avoid the microwave heating, nitrogen gas keeps flowing into cavity during the measurement. The reason we have added this experimental step is because we observed a non-linear power dependence of ISHE voltage in previous work, 14 which was found to be related to the heating of LSMO.…”

Section: Methodsmentioning

confidence: 99%

“…This phenomenon is called inverse spin Hall effect (ISHE). 12,13 14 no data have been reported on the effect of the Pt on the FMR linewidth. Therefore, in this work we employ ferromagnetic resonance in microstrip line (MS-FMR) and cavity-FMR to measure the frequency dependence of microwave absorption linewidth and ISHE respectively in bare LSMO (20 nm) and Pt capped LSMO(20 nm).…”

Section: Introductionmentioning

confidence: 99%

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Enhanced magnetic damping in La0.7Sr0.3MnO3 capped by normal metal layer

et al. 2015

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La 0.7 Sr 0.3 MnO 3 (LSMO) and Pt capped La 0.7 Sr 0.3 MnO 3 20 nm thick films have been grown on SrTiO 3 substrates by pulsed laser deposition. Microstrip line ferromagnetic resonance (MS-FMR) technique is then used to investigate their magnetic dynamic properties and to particularly measure the damping constant based on the frequency dependence of microwave absorption linewidth. The results show that the effective damping constant of LSMO(20nm)/Pt(5.5nm) is three times larger than that of LSMO(20nm) and the films present weak in-plane uniaxial anistropy. The enhancement of the magnetic damping constant due to the capping of Pt is the manifestaction of the generation of spin current in Pt layer. Furthermore, the spin current induces an inverse spin Hall effect (ISHE) in LSMO(20nm)/Pt(5.5nm) system, measured using the FMR in cavity with 9.8 GHz excitation frequency. The linear dependence of ISHE on microwave power validates the mechenism of spin pumping in this bilayer system. C 2015 Author(s). All article content, except where otherwise noted, is licensed under a Creative Commons Attribution 3.0 Unported License.

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Section: Resultsmentioning

confidence: 52%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Enhanced magnetic damping in La0.7Sr0.3MnO3 capped by normal metal layer

et al. 2015

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“…Enlighted by our pioneer work on La 0.7 Sr 0.3 MnO 3 (LSMO)/Pt bilayers 25, 26 , it is realized that a systematic SP-FMR study should include all essential physical parameters for the investigated materials as well as a comprehensive analysis on FMR data, such that the origin of disagreement among reports could be self-prevailed. In this work we utilize the technique of cavity SP-FMR to investigate the intrinsic spin current properties on two series of LSMO/Pt bilayers with varying the thickness of LSMO and Pt.…”

Section: Introductionmentioning

confidence: 99%

Spin pump and probe in lanthanum strontium manganite/platinum bilayers

Luo

Lin

Chiang

et al. 2017

Sci Rep

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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) × 1019 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.

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“…Manganite films for which the Curie temperature Tc is close to room temperature, especially attractive for practical applications. Although a number of studies have been carried out on the excitation of a spin current by ferromagnetic resonance in two LSMO/NM layer structures (NM is a normal metal, usually platinum) [9,10], there is no data on the temperature dependence of the width of the FMR line in the presence of spin current in ferromagnets.…”

Section: Introductionmentioning

confidence: 99%

Temperature dependence of Gilbert damping in manganite/normal metal heterostructure

et al. 2018

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Abstract. The temperature dependence of the spin-pumping effect on the Gilbert damping in a bilayer based on epitaxial manganite film grown on neodymium galate substrate was investigated by measuring of the linewidth of the ferromagnetic resonance spectrum (FMR). Ferromagnetic resonance in thin ferromagnetic manganite La 0.7 Sr 0.3 MnO 3 (LSMO) films is used to produce a spin current at the interface between a metallic and a ferromagnetic layer. Pt/LSMO/NGO, Au/LSMO/NGO and LSMO/NGO heterostrucutres were measured. An increase of the linewidth in FMR spectrum at the temperature lower liquid nitrogen temperature (77K) is observed .

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Influence of damping constant on inverse spin hall voltage of La0.7Sr0.3MnO3(x)/platinum bilayers

Cited by 25 publications

References 33 publications

Enhanced magnetic damping in La0.7Sr0.3MnO3 capped by normal metal layer

Enhanced magnetic damping in La0.7Sr0.3MnO3 capped by normal metal layer

Spin pump and probe in lanthanum strontium manganite/platinum bilayers

Temperature dependence of Gilbert damping in manganite/normal metal heterostructure

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