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http://dx.doi.org/10.4283/JKMS.2008.18.2.075

The Study on Mössbauer Spectroscopy of Zn1-xFexO  

Kim, S.J. (Department of Physics, Yeungnam University)
Lee, S.R. (Department of Physics, Yeungnam University)
Park, C.S. (Department of Physics, Yeungnam University)
Kim, E.C. (Department of Physics, Yeungnam University)
Joh, Y.G. (Department of Physics, Yeungnam University)
Kim, D.H. (Department of Physics, Yeungnam University)
Abstract
$AB_2X_4$(A, B=Transition Metal, X=O, S, Se) are cubic spinel normal ferrimagnets, in which M ions occupy the tetrahedral sites and Cr ions occupy the octahedral sites. Recently, they have been investigated for behaviour of B site ions and A-B interaction. Polycrystalline $[Co_{0.9}Zn_{0.1}]_A[Cr_{1.98}{^{57}Fe_{0.02}}]_BO_4$ compound was prepared by wet-chemical process. The ferrimagnetic transition was observed around 90K. $M\"{o}ssbauer$ absorption spectra at 4.2K show that the well-developed two sextets are superposed with small difference in hyperfine fields($H_{hf}$). The hyperfine fields of $CoCr_{1.98}{^{57}Fe_{0.02}}O_4$ and $Co_{0.9}Zn_{0.1}Cr_{1.98}{^{57}Fe_{0.02}}O_4$ were determined to be 488, 478 kOe and 486, 468 kOe, respectively. We notice that the one of the magnetic hyperfine field values changes with Zn ion substitution. These results suggest the incommensurate states and spin-reorientation temperature($T_S=18K$) changes with Zn ions substitution below spin-reorientation temperature($T_S=28K$) of $CoCr_{1.98}{^{57}Fe_{0.02}}O_4$
Keywords
$Zn_{1-x}Fe_xO$$M\ddot{o}ssbauer$; Ti-getter;
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