M?ssbauer studies of multiferroic spinel CoCr...

J. Appl. Phys. 101, 09M105 (2007); doi:10.1063/1.2712022 (3 pages)
Mössbauer studies of multiferroic spinel CoCr1.98O4
Kang Ryong Choi, Sung Baek Kim, and Chul Sung Kim
Department of Physics, Kookmin University, Seoul 136-702, Koreamap
(Received 6 November 2006; accepted 15 December 2006; published online 7 May 2007)

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Abstract
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In order to elucidate the role of Cr ions in CoCr2O4 exhibiting multiferroic property, we have substituted a small amount of Fe ions for Cr sites and investigated the magnetic behavior of Fe ions on atomic scale, using Mössbauer measurement. Polycrystalline CoCr1.98O4 compound was prepared by wet-chemical process. The crystal structure was found to be a single-phase cubic spinel with space group of Fd-3m. The lattice constant (a0) and the internal structural parameter (x) of the oxygen were determined to be 8.340 and 0.264?Å, respectively. Mössbauer absorption spectra at 4.2?K show that the well developed two sextets are superposed with small difference in hyperfine field. Isomer shift values (δ) of the two sextets are found to be 0.34 and 0.35?mm/s relative to the Fe metal, which are consistent with the high spin Fe3+ charge state. With increasing temperature, the sextets gradually split into two subspectra, and then around 28?K the absorption line broadening of outer sextet appears rapidly. Above the Néel temperature (TN = 97?K) the paramagnetic doublets are observed. The sudden change of outer sextet is observed above 28?K, which corresponds to the spin transition temperature. Mössbauer measurement results suggest that Cr3+ ions have two different magnetic sites, and the temperature dependent magnetic property is attributable to the different behaviors of magnetic ions in the two sites.
© 2007 American Institute of Physics
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KEYWORDS and PACS
Keywords
cobalt compounds,chromium compounds,iron compounds,Mossbauer effect,multiferroics,ferromagnetic materials,crystal structure,space groups,lattice constants,hyperfine interactions,Neel temperature,paramagnetic materials
PACS
75.50.Dd
Nonmetallic ferromagnetic materials
76.80.+y
Mössbauer effect; other γ-ray spectroscopy
75.80.+q
Magnetomechanical effects, magnetostriction
61.50.Ah
Theory of crystal structure, crystal symmetry; calculations and modeling
71.70.Jp
Nuclear states and interactions
75.20.Ck
Nonmetals
ARTICLE DATA
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http://link.aip.org/link/JAPIAU/v101/i9/p09M105/s1
PUBLICATION DATA
ISSN:
0021-8979 (print)
1089-7550 (online)
Publisher:
American Institute of Physics
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Y. Yamasaki, S. Miyasaka, Y. Kaneko, J.-P. He, T. Arima, and Y. Tokura, Phys. Rev. Lett. 96, 207204 (2006).
H. Katsura, N. Nagaosa, and A. V. Balatsky, Phys. Rev. Lett. 95, 057205 (2005).
G. Lawes, B. Melot, K. Page, C. Ederer, M. A. Hayward, Th. Proffen, and R. Seshadri, Phys. Rev. B 74, 024413 (2006).
S.-H. Lee, C. Broholm, W. Ratcliff, G. Gasparovic, Q. Huang, T. H. Kim, and S.-W. Cheong, Nature (London) 418, 856 (2002).
H. Ueda, H. Aruga Katori, H. Mitamura, T. Goto, and H. Takagi, Phys. Rev. Lett. 94, 047202 (2005).
R. N. Bhowmik, R. Ranganathan, and R. Nagarajan, Phys. Rev. B 73, 144413 (2006).
K. Tomiyasu, J. Fukunaga, and H. Suzuki, Phys. Rev. B 70, 214434 (2004).
I. A. Sergienko and E. Dagotto, Phys. Rev. B 73, 094434 (2006).
S. W. Lee and C. S. Kim, Journal of Magnetics (Seoul) 10, 5 (2005).
A. Yoshimori, J. Phys. Soc. Jpn. 14, 807 (1959).
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