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Title: Thermal stability of exchange-biased NiFe/FeMn multilayered thin films
Authors: Chen, H.Y.
Phuoc, N.N. 
Ong, C.K. 
Issue Date: 1-Sep-2012
Citation: Chen, H.Y., Phuoc, N.N., Ong, C.K. (2012-09-01). Thermal stability of exchange-biased NiFe/FeMn multilayered thin films. Journal of Applied Physics 112 (5) : -. ScholarBank@NUS Repository.
Abstract: A systematic study of the effect of ferromagnetic thickness on magnetic and microwave properties of exchange-biased NiFe/FeMn multilayered thin films was carried out with regards to thermal stability. The temperature-dependent microwave characteristics of the films were obtained from the near-field microwave microscopy technique and analysed based on Landau-Lifshitz-Gilbert equation. The complex microwave permeability spectra of the magnetic thin films up to 5 GHz in the temperature range from room temperature to 420 K were measured. It was found that thicker ferromagnetic layers helped to reduce the dependence of the magnetic properties on temperature, leading to better thermal stability. The saturation magnetization M S, dynamic magnetic anisotropy field H K dyn, and ferromagnetic resonance frequency f FMR were found to decrease with temperature, while the effective damping coefficient α eff was increased with temperature. We also investigate the rotational magnetic anisotropy field H K rot with temperature which gives a measure of the rotatable magnetization of the antiferromagnetic layers and its thermal stability. © 2012 American Institute of Physics.
Source Title: Journal of Applied Physics
ISSN: 00218979
DOI: 10.1063/1.4752260
Appears in Collections:Staff Publications

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