期刊
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
卷 310, 期 2, 页码 E443-E445出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jmmm.2006.10.476
关键词
Shastry-Sutherland lattice; geometric frustration; TmB4
We have measured magnetization processes of a Shastry-Sutherland lattice (SSL) TmB4. For B parallel to c, plateaus appear at (1)/(8) and (1)/(2) of the full moment 7 mu B/Tm at 1.7-1.4 and 2-3 T, respectively. For B parallel to a, a metamagnetic transition occurs at similar to 30 T which is followed by a plateau at similar to 32 T. These plateaus are originated from geometric frustration effect in SSL. Magnetic field and temperature dependences of magnetoresistance and specific heat were also measured in detail below T-N = 11.7 K. The magnetic phase diagram possesses complex features which have an antiferromagnetic phase, spin flop saturated one, and a few additional phases by long periodic modulations originated from frustration effect in SSL. (c) 2006 Published by Elsevier B.V.
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