Bi-substitution-induced magnetic moment distribution in spinel BixCo2&#8722

Title
Bi-substitution-induced magnetic moment distribution in spinel BixCo2− xMnO4 multiferroic

Title
xMnO4 multiferroic
Authors
N. E. RajeevanRavi KumarD. K. ShuklaP. ThakurN. B. Brookes채근화최원국Sanjeev GautamS. K. AroraI. V. ShvetsP. P. Pradyumnan
Keywords
near-edge x-ray absorption spectroscopy (NEXAFS); multiferroic; ferrimagnetism; ferroelectricity
Issue Date
2009-09
Publisher
Journal of physics, Condensed matter : an Institute of Physics journal
Citation
VOL 21, NO 40, 406006-1-406006-6
Abstract
We report the near-edge x-ray absorption spectroscopy (NEXAFS) at the Co/Mn L3,2 edge and oxygen K edge of the well-characterized Bi-substituted Co2MnO4 multiferroic samples. The evolution of peak features in NEXAFS spectra of the Co/Mn L3,2 edge and O K edge show the Bi-induced redistribution of magnetic cations (Co/Mn). The variation in valence states of Co and Mn in all the substituted compositions is consistent with the observed ferrimagnetic behaviour of the samples. Magnetization data show the decrease in molecular field complementing the ferrimagnetism. The role of Bi in the enhancement of magnetic interactions as well as the appearance of ferroelectricity in BixCo2−xMnO4 (0 ≤ x ≤ 0.3) is discussed.
URI
http://pubs.kist.re.kr/handle/201004/35850
ISSN
0953-8984
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KIST Publication > Article
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