ISSN:
1662-8985
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
The High saturation magnetization (Ms) media are desired to yield large flux density forhigh resolution giant magnetoresistive head readout in Heat Assisted Magnetic Recording (HAMR).To ensure adequate stability of small size domains, the media for HAMR should possess largecoercivity (Hc). In this work, we study of interface wall energy and the behavior of the magnetizationof each layer in exchange coupled doubled-layered (ECDL) films. The Tb17Co83 (90 nm)/Tb30Co70ECDL films with different Tb30Co70 thickness (20, 35, 50, 70, 90 nm) are made to increase the Msvalue. As the thickness of Tb30Co70 film increase from 20 to 90 nm, the coercivity of the filmsincreases from 2.5 to 8 kOe. The enhanced coercivity of ECDL films is due to the formation ofdomain wall at the interface of the ECDL film. As the Tb30Co70 increases from 20 to 90 nm, the Msvalue of the films decreases from 380 to 330 emu/cm3. Due to Co has larger magnetic moment thanthat of Tb at room temperature, the resulting Ms value of the films decreases with increasing thethickness of Tb30Co70 layer
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/01/41/transtech_doi~10.4028%252Fwww.scientific.net%252FAMR.47-50.781.pdf
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