First-order reversal curves of magnetic recording tapes

doi:10.1088/1674-1056/19/5/057502

Abstract The interaction and its variation between magnetic grains in two kinds of magnetic recording tapes are investigated by first-order reversal curves (FORC) and the $\delta M$ method. The composition and microstructure of the samples are characterised by x-ray diffraction and scanning electron microscope. The FORC diagram can provide more accurate information of the interaction and its variation, but the $\delta M$ curves cannot. The positive interaction field and the large variation of the interaction field have opposite effects on the $\delta M$ curve.

Keywords: magnetic interaction first-order reversal curves the $\delta$ M method magnetic recording tape

Received: 31 January 2009
Revised: 21 December 2009
Accepted manuscript online:

PACS:	75.50.Ss	(Magnetic recording materials)
	61.05.cp	(X-ray diffraction)
	68.37.Hk	(Scanning electron microscopy (SEM) (including EBIC))
	75.60.Ej	(Magnetization curves, hysteresis, Barkhausen and related effects)

Fund: Project supported by the National Natural Science Foundation of China (Grant Nos.~50672008 and 50971023) and Specialized Research Fund for the Doctoral Program of Higher Education of China (Grant No.~20090006120019).

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Yin Jin-Hua(阴津华) and Pan Li-Qing(潘礼庆) First-order reversal curves of magnetic recording tapes 2010 Chin. Phys. B 19 057502

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