[Zurück]

M. Zhang, W.J. Ren, Z. Zhang, X.K. Sun, W. Liu, D.Y. Geng, X.G. Zhao, R. Grössinger, D. Triyono:
"Magnetic properties and exchange coupling of nanocomposite (Nd,Y)₂Fe₁₄B/ α -Fe";
Journal of Applied Physics, Vol. 94 (2003), Nr. 4; S. 2602 - 2606.

Magnetic properties and exchange coupling of nanocomposite (Nd,Y)2Fe14B/ [alpha] -Fe

M. Zhang, W. J. Ren, Z. D. Zhang, X. K. Sun, W. Liu, D. Y. Geng, and X. G. Zhao Shenyang National Laboratory for Materials Science, Institute of Metal Research
International Centre for Materials Physics, Chinese Academy of Sciences, 72 Wenhua Road, Shenyang 110016, China

R. Grössinger and D. Triyono Institut fur Festkörperphysik, Technische Universität Wien, Wiedner Haupttrasse 8-10, A1040 Vienna, Austria

(Received 16 January 2003; accepted 29 May 2003)

Magnetic properties and exchange couplings of nanocomposite (Nd,Y)2Fe14B/ [alpha] -Fe magnets prepared by mechanical milling have been investigated at low temperatures. With decreasing temperature, due to Y substitution for Nd, an extension of the exchange coupling length in nanocomposite magnets occurs in a wider temperature range. This can be attributed a decreasing anisotropy of the hard-magnetic phase so that more soft-magnetic grains participate the exchange coupling. Close to 135 K, due to the spin reorientation, the hard magnetic phase is not more uniaxail, which leads to a drastic decrease of the magnetic properties of the Nd2Fe14B-based nanocomposite magnets. ©2003 American Institute of Physics.

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