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In situ Photoemission Study of the Room Temperature Ferromagnet ZnGeP2-Mn

Ishida, Y and Sarma, DD and Okazaki, K and Okabayashi, J and Hwang, JI and Ott, H and Fujimori, A. and Medvedkin, GA and Ishibashi, T and Sato, K (2003) In situ Photoemission Study of the Room Temperature Ferromagnet ZnGeP2-Mn. In: Physical Review Letters, 91 (10). p. 4.

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The chemical states of the ZnGeP2:Mn interface which shows ferromagnetism above room temperature have been studied by photoemission spectroscopy. Mn deposition on the ZnGeP2 substrate heated to 400degreesC induced Mn substitution for Zn and then the formation of metallic Mn-Ge-P compounds. Depth profile studies have shown that Mn 3d electrons changed their character from itinerant to localized along the depth, and in the deep region, dilute divalent Mn species (< 5% Mn) was observed with a coexisting metallic Fermi edge of non-Mn 3d character. The possibility of hole doping through Mn substitution for Ge and/or Zn vacancy is discussed.

Item Type: Journal Article
Publication: Physical Review Letters
Publisher: The American Physical Society
Additional Information: Copyright of this article belongs to The American Physical Society.
Department/Centre: Division of Chemical Sciences > Solid State & Structural Chemistry Unit
Date Deposited: 21 Aug 2009 05:15
Last Modified: 19 Sep 2010 04:55
URI: http://eprints.iisc.ac.in/id/eprint/17059

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