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Unusual room temperature ferromagnetism in bulk sintered GaP doped with copper
KTH, School of Industrial Engineering and Management (ITM), Materials Science and Engineering, Engineering Material Physics.
KTH, School of Industrial Engineering and Management (ITM), Materials Science and Engineering, Engineering Material Physics.
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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
Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
URN: urn:nbn:se:kth:diva-39452DOI: 10.1109/TMAG.2007.893998ISI: 000246706200317Scopus ID: 2-s2.0-34249094296OAI: oai:DiVA.org:kth-39452DiVA: diva2:440065
Note
Conference: 10th Joint Magnetism and Magnetic Materials Conference/International Magnetics Conference. Balitmore, MD. JAN 07-11, 2007 Available from: 2011-09-12 Created: 2011-09-09 Last updated: 2017-12-08Bibliographically approved

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