Anomalies in thermal expansion of rare-earth diborides in the temperature range of magnetic phase transformations

作者：Novikov V V^*; Chukina T A; Verevkin A A

来源：Physics of the Solid State, 2010, 52(2): 364-369.

DOI：10.1134/S106378341002023X

The variations with temperature of the lattice parameters a(T) and c(T) and the thermal expansion coefficients of rare-earth diborides RB(2)(R=Tb, Dy, Ho, Er, Tm, Lu) have been investigated in the temperature range 4.2-300 K. It has been revealed that the dependences a(T) and c(T) exhibit an anomalous behavior in the vicinity of the ferromagnetic transformation temperatures T (c) which correlates with the temperature dependences of the heat capacity. It has been established that the magnetic contributions to the thermal expansion of the diborides Delta a (m)(T) increase with increasing temperature and tend to c

• 出版日期2010-2