Antiferromagnetic transition temperature

The resistivities of the magnetic borides DyB, H0B12, ErB, and TmB, have been carefully measured by Gabani et al. (1999) for good quality crystals with low room temperature resistivities (10-30 p 2 cm) compared to the early work. Near the antiferromagnetic transition temperatures Tn, the resistivities all show small increases in the form of humps and then rapid drops as the temperature is lowered. This behavior can be explained as an initial increase in the resistivity attributed to the appearance of superzone boundaries within the Brillouin zone, followed by a decrease due to a reduction in spin scattering (Taylor and Darby, 1972 Fournier and Gratz, 1993). 

An updated/refined list of the respective superconducting and antiferromagnetic transition temperatures for the RB12 phases is given in Table 1. 

Fig. 4.10 Magnetization (a) and capacitance (b) measurements showing that EuTiOs on DyScOs is ferromagnetic below TC54.2460.02K and that these two quantities are coupled. Tn is antiferromagnetic transition temperature of DyScOs [9]...

Cp.m = aT3 (antiferromagnetic crystals below the magnetic transition temperature if it occurs at low T (4.8)... 

The general behaviour of the specific heat near a magnetic transition is illustrated in Fig. 3.6 for MnC03. This carbonate undergoes a paramagnetic to antiferromagnetic transition at 24.9 K as the temperature is lowered. 

NEEL TEMPERATURE. The transition temperature for an antiferromagnetic material. Maximal values of magnetic susceptibility, specific heat, and thermal expansion coefficient occur at the NEel temperature. 

Ce3Cu3Sb4 was found to be a semiconducting ferromagnet with ferromagnetic transition temperature, Tm = 10 T while GdTTitSh4 was reported to be a metallic antiferromagnet with 7n = 12K(Patil et al., 1996). 

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