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Unusual room temperature ferromagnetism in bulk sintered GaP doped with copper
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2007 (English)In: IEEE transactions on magnetics, ISSN 0018-9464, E-ISSN 1941-0069, Vol. 43, no 6, 3043-3045 p.Article in journal (Refereed) Published
Abstract [en]

Robust room temperature ferromagnetism is obtained in single phase Gallium Phosphide doped with Cu2+ prepared by simple solid state reaction route. The saturation magnetization at 300 K is 1.5 x 10(-2) emu/g and the coercivity was found to be 125 Oe. A strong ferromagnetic resonance signal confirms the long range magnetic order which persists to temperatures as high as 739 K. X-ray absorption spectroscopy (XAS) indicate that Cu is in a +2 state. Ab initio calculations also show that the ferromagnetic ordering is energetically favorable in Cu doped GaP. When the spin-orbit coupling is included we get an enhanced total magnetic moment of 0.31 mu(B) with a local moment on Cu 0.082 and on P 0.204 mu(B). per atom.

Place, publisher, year, edition, pages
2007. Vol. 43, no 6, 3043-3045 p.
Keyword [en]
GaP : Cu, magnetic resonance, magnetic semiconductors, materials science and technology, spintronics
National Category
Physical Sciences
URN: urn:nbn:se:uu:diva-151500DOI: 10.1109/TMAG.2007.893998ISI: 000246706200317OAI: oai:DiVA.org:uu-151500DiVA: diva2:410222
Available from: 2011-04-13 Created: 2011-04-12 Last updated: 2012-03-05Bibliographically approved

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Ahuja, Rajeev
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