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Current Nanoscience

Editor-in-Chief

ISSN (Print): 1573-4137
ISSN (Online): 1875-6786

Comparative Studies on the Microstructure and Magnetic Properties of FePt/ (Ag, MgO) Nanocomposite thin Films on Glass Substrate

Author(s): Wei Lu, Chenchong He, Zhe Chen, Junwei Fan, Yuxin Wang and Biao Yan

Volume 8, Issue 3, 2012

Page: [343 - 347] Pages: 5

DOI: 10.2174/157341312800620232

Price: $65

Abstract

A comparative study on the microstructure and magnetic properties of FePt-MgO and FePt-Ag thin film sputtered onto glass substrate has been carried out systematically in this paper. FePt-MgO thin film shows better (001) orientation of L10-ordered FePt phase, narrower c-axis orientation distribution, higher out-of-plane coercivity, higher remanence ratio and larger hysteresis slope α than the FePt-Ag thin film. The results of angular variation of coercivity indicate that the magnetization reversal behavior of FePt-MgO thin film is closer to the Stoner–Wohlfarth rotation model than that of FePt-Ag thin film. The magnetic domain size in FePt-MgO thin film (~80nm) is smaller than that in FePt-Ag thin film (~160nm) due to the isolated grain structure. From this point of view, the FePt-MgO thin film is more suitable than the FePt-Ag thin film for the application of high density recording media.

Keywords: FePt thin film, magnetic recording media, magnetic properties, magnetization reversal, magnetic coupling, Stoner–Wohlfarth rotation, Glass Substrate


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