Effect of spacer layer on the magnetization dynamics of permalloy/rare-earth/permalloy trilayers

Journal Article · Thu May 07 00:00:00 EDT 2015 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.4915102· OSTI ID:22410059

Luo, Chen; Yin, Yuli; Zhang, Dong; Jiang, Sheng; Yue, Jinjin; Zhai, Ya ^[1]; Du, Jun; Zhai, Hongru ^[2]

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1. Physics Department, Southeast University, Nanjing 211189 (China)
2. National Laboratory of Solid State Microstructures, Nanjing University, Nanjing 210093 (China)

The permalloy/rare-earth/permalloy trilayers with different types (Gd and Nd) and thicknesses of spacer layer are investigated using frequency dependence of ferromagnetic resonance (FMR) measurements at room temperature, which shows different behaviors with different rare earth spacer layers. By fitting the frequency dependence of the FMR resonance field and linewidth, we find that the in-plane uniaxial anisotropy retains its value for all samples, the perpendicular anisotropy remains almost unchanged for different thickness of Gd layer but the values are tailored by different thicknesses of Nd layer. The Gilbert damping is almost unchanged with different thicknesses of Gd; however, the Gilbert damping is significantly enhanced from 8.4×10{sup −3} to 20.1×10{sup −3} with 6 nm of Nd and then flatten out when the Nd thickness rises above 6 nm.

• OSTI ID: 22410059
• Journal Information: Journal of Applied Physics, Vol. 117, Issue 17; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ANISOTROPY
DAMPING
FERROMAGNETIC RESONANCE
FREQUENCY DEPENDENCE
GADOLINIUM
LAYERS
MAGNETIZATION
NEODYMIUM
PERMALLOY
SPACERS
TEMPERATURE RANGE 0273-0400 K
THICKNESS