Armenian Journal of Physics

ROOM-TEMPERATURE MOLECULAR FERROMAGNETISM BASED ON NICKEL PHTHALOCYANINE. MAGNETIC RESONANCE, OPTICAL AND XANES SPECTRA

Manukyan, A.S. and Mirzakhanyan, A.A. and Butaeva, T.I. and Guda, A.A. and Soldatov, A.V. and Bugaev, L.A. and Asatryan, H.R. and Baranov, P.G. and Sharoyan, E.G. (2010) ROOM-TEMPERATURE MOLECULAR FERROMAGNETISM BASED ON NICKEL PHTHALOCYANINE. MAGNETIC RESONANCE, OPTICAL AND XANES SPECTRA. Armenian Journal of Physics, 3 (3). pp. 272-275. ISSN 1829-1171

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Abstract

A method of synthesis of room-temperature ferromagnetic samples of nickel phthalocyanine (NiPc) doped with K and Rb atoms has been developed. These materials are air-stable and have a Curie temperature higher than 300oC. Measurements of optical spectra show that the doping leads to the essential changes in spectra, in particular, to the shift of peaks in the visible range. In the spectra of magnetic resonance of doped samples an intense wide asymmetric line of ferromagnetic resonance and a narrow signal with g ≈ 2 is observed. In order to reveal the nature of ferromagnetism of the obtained compounds and to determine the nearest local environment of Ni ions, the spectra of X-ray absorption near-edge structure (XANES) were also measured.

Item Type:Article
Subjects:Physics > 81.Materials science
ID Code:290
Deposited By:Prof. Vladimir Aroutiounian
Deposited On:08 Nov 2010 12:27
Last Modified:19 Apr 2011 02:42

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