Critical behaviour of the magnetic susceptibility at marginal dimensionality in LiTbF4
- 20 March 1980
- journal article
- Published by IOP Publishing in Journal of Physics C: Solid State Physics
- Vol. 13 (8) , 1481-1491
- https://doi.org/10.1088/0022-3719/13/8/018
Abstract
The parallel susceptibility of LiTbF4 has been measured in the critical region and is well described by the law chi c(t)= Gamma t-1 mod ln(t0/t) mod 1/3 where t is the reduced temperature; t=T/Tc-1 over the range 2*10-4-1 with Tc=2.8850K, Gamma =(3.87+or-0.05)*10-2 emu cgs g-1, t0=5.5+or-2.5 ( Gamma N=0.910+or-0.012 in dimensionless units). A detailed discussion for the choice of t0 and of the exponent of the logarithmic correction z=1/3 is given. The universal ratio Rc between the critical amplitudes of the magnetic susceptibility, the specific heat and the spontaneous magnetisation, Rc=TcAB-2 Gamma , is tested.Keywords
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