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http://dx.doi.org/10.4283/JKMS.2006.16.5.261

Magnetic Susceptibility of the Single Crystal MnF2(1.5% EuF3)  

Lee, Jun-Young (Department of Physics, College of Liberal Arts and Sciences, Yonsei University)
Nahm, Kyun (Department of Physics, College of Liberal Arts and Sciences, Yonsei University)
Kim, Chul-Koo (Institute of Physics and Applied Physics, Yonsei University)
Abstract
In order to investigate the magnetic properties of Eu ions in the single crystal $MnF_2$, the temperature dependent magnetic susceptibilities of the antiferromagnetic $MnF_2$ and the single crystal $MnF_2$(1.5% $EuF_3$) with the rutile structures were measured in the temperature range from 4K to 300K. The detailed analysis of the measured susceptibilities showed that the magnetic susceptibility by the doping of the small amount $EuF_3$ in the antiferromagnetic single crystal $MnF_2$ follows the antiferromagnetic Curie-Weiss law with the negative paramagnetic Curie temperature similarly as in $MnF_2$. It was also found that Eu ion has +3 valence. This solves the long standing discrepancy on this problem.
Keywords
single crystal $MnF_2$(1.5% $EuF_3$); magnetic susceptibility; Curie-Weiss law; effective magnetic moment; paramagnetic Curie temperature;
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