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Magnetic properties of the rare-earth diborodicarbides (RB2C2)
Authors:T. Sakai  G. Adachi  J. Shiokawa
Affiliation:Department of Applied Chemistry, Faculty of Engineering, Osaka University, Yamadakami, Suita-shi, Osaka-fu 565, Japan
Abstract:
The magnetic susceptibility of RB2C2 has been measured in the temperature range of 3–300 K. Curie-Weiss fits to the susceptibilities led to effective moments in agreement with those expected for R3+ ions. The RB2C2 (R = Ce, Nd, Sm, Gd, Tb, Er, and Tm) compounds are antiferromagnetic. Metamagnetic transitions at low fields were observed for CeB2C2 and TbB2C2. The compounds, DyB2C2 and HoB2C2, are ferromagnets with complex magnetic structures. Praseodymium borocarbide becomes a Van Vleck paramagnet at low temperature. The magnetic ordering temperatures of these compounds are discussed in terms of their crystal structure and the RKKY theory.
Keywords:To whom correspondence should be addressed.
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