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Please use this identifier to cite or link to this item: http://hdl.handle.net/2262/40214

Title: Magnetization Process in Dilute Magnetic Oxides
Author: VENKATESAN, MUNUSWAMY
COEY, JOHN MICHAEL DAVID
STAMENOV, PLAMEN
Sponsor: Science Foundation Ireland
Author's Homepage: http://people.tcd.ie/jcoey
http://people.tcd.ie/venkatem
http://people.tcd.ie/stamenp
Keywords: MAGNETICS
FERROMAGNETISM
Issue Date: 2010
Citation: Coey, J. M. D.; Mlack, Jerome T.; Venkatesan, M.; Stamenov, P., Magnetization Process in Dilute Magnetic Oxides, IEEE Transactions on Magnetics, 46, 6, 2010, 2501-2503
Series/Report no.: IEEE Transactions on Magnetics
46
6
Abstract: Thin films of dilute magnetic oxides often exhibit high-temperature ferromagnetism with magnetization curves of the form M approximate to M-s tanh(H/H-0); the curves are practically anhysteretic and temperature-independent below room temperature. The absence of temperature-dependent coercivity indicates that the magnetization process is dominated by magnetic dipole interactions, not by magnetocrystalline anisotropy. In a model of ferromagnetic grain boundaries, H-0 approximate to 0.14M(0), where M-0 is the magnetization of the ferromagnetic regions. Quantitative analysis of more than 200 films of different oxides reveals that only a few percent of the volume of these films is magnetically ordered.
Description: PUBLISHED
URI: http://hdl.handle.net/2262/40214
Appears in Collections:Physics (Scholarly Publications)

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