Enhanced magnetic damping in La0.7Sr0.3MnO3 capped by normal metal layer
Source abstract
Abstract
La0.7Sr0.3MnO3(LSMO) and Pt capped La0.7Sr0.3MnO3 20 nm thick films have been grown on SrTiO3 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.
Source: crossref · Quality: baseline
Research context
OpenAlex topics: Magnetic properties of thin films · Magnetic and transport properties of perovskites and related materials · Multiferroics and related materials
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
National Taiwan University 1 Deparment of Physics, , Taipei 10617, Taiwan
National Taiwan University 2 Center for Condensed Matter Sciences, , Taipei 10617, Taiwan
LSPM (CNRS-UPR 3407) 3 , Université Paris 13, Sorbonne Paris Cité, 99 avenue Jean-Baptiste Clément, 93430 Villetaneuse, France
Funding
Ministry of Science and Technology, Taiwan
References (18)
Show source-provided references
1. Giant magnetoresistance of (001)Fe/(001)Cr magnetic superlattices10.1103/PhysRevLett.61.2472 ↗
2. Enhanced magnetoresistance in layered magnetic structures with antiferromagnetic interlayer exchange10.1103/PhysRevB.39.4828 ↗
3. Large magnetoresistance at room temperature in ferromagnetic thin film tunnel junctions10.1103/PhysRevLett.74.3273 ↗
4. Current-induced magnetization reversal in nanopillars with perpendicular anisotropy10.1038/nmat1595 ↗
5. Nearly total spin polarization in La2/3Sr1/3MnO3 from tunneling experiments10.1063/1.1534619 ↗
6. Perovskite manganite magnetic tunnel junctions with enhanced coercivity contrast10.1063/1.1995955 ↗
7. Giant magnetoresistance in organic spin valves10.1038/nature02325 ↗
8. Room temperature spin polarized injection in organic semiconductors10.1016/S0038-1098(02)00090-X ↗
9. Inverse spin-hall effect induced by spin pumping in different thickness Pt films10.1109/TMAG.2010.2042150 ↗
10. Spin pumping at the magnetic insulator (YIG)/normal metal (Au) interfaces10.1103/PhysRevLett.107.066604 ↗
11. Enhanced Gilbert damping in thin ferromagnetic films10.1103/PhysRevLett.88.117601 ↗
12. Determination of spin pumping as a source of linewidth in sputtered Co90Fe10/Pd multilayers by useof broadband ferromagnetic resonance spectroscopy10.1103/PhysRevB.85.054412 ↗
13. Conversion of spin current into charge current at room temperature: Inverse spin-Hall effect10.1063/1.2199473 ↗
14. Influence of damping constant on inverse spin hall voltage of La 0.7 Sr 0.3 MnO 3 (x)/platinum bilayers10.1063/1.4863485 ↗
15. Microstrip line ferromagnetic resonance and Brillouin light scattering investigations of magneticproperties of Co2MnGe Heusler thin films10.1103/PhysRevB.79.024419 ↗
16. Magnetism and structural distortion in the La0.7Sr0.3MnO3 metallic ferromagnet10.1103/PhysRevB.53.14285 ↗
17. Temperature dependence of magnetic properties of La0.7Sr0.3MnO3/SrTiO3 thin films on silicon substrates10.1103/PhysRevB.81.054410 ↗
18. Co2FeAl thin films grown on MgO substrates: Correlation between static, dynamic and structural properties10.1103/PhysRevB.87.184431 ↗