Low temperature heat capacity of Nd2Zr2O7 pyrochlore

Low-temperature Normal-state Heat Capacity of Tungsten

Low Temperature Heat Capacity and Thermodynamic Properties of Zinc Ferrite*

The heat capacity of zinc ferrite (ZnFe,O,) has been determined over the range 5 to 350°K. Molal values of C~,S’, and HO-H,O computed from the thermal data are 32,99&t-0.03 cal/deg., 36.01 f0.03 cal/deg., and 18,00&0.02 Cal, respectively, at 298,lS”K. A co-operative thermal anomaly associated with antiferromagnetic ordering occurs at 9.5” and extends toward higher temperatures probably as a con...

Low-temperature excess heat capacity in fresnoite glass and crystal

The effect of thermal annealing on low-temperature excess heat capacity was investigated in fresnoite (Ba2TiSi2O8) glass. The amplitudes of the excess heat capacity decreased, and their positions shifted to a higher temperature by relaxation or crystallization. In particular, we revealed that the change in the excess heat capacity during transition from the glassy state to the crystalline state...

Ising Pyrochlore Magnets: Low-Temperature Properties, “Ice Rules,” and Beyond

R. Siddharthan,1 B. S. Shastry,1 A. P. Ramirez,2 A. Hayashi,3 R. J. Cava,3 and S. Rosenkranz4 1Department of Physics, Indian Institute of Science, Bangalore 560012, India 2Bell Laboratories, Lucent Technologies, 600 Mountain Avenue, Murray Hill, New Jersey 07974 3Chemistry Department, Princeton University, Princeton, New Jersey 08540 4Materials Science Division, Argonne National Laboratory, Arg...

Low-temperature low-field phases of the pyrochlore quantum magnet Tb2Ti2O7.

By means of ac magnetic-susceptibility measurements, we find evidence for a new magnetic phase of Tb2Ti2O7 below about 140 mK in zero magnetic field. In magnetic fields parallel to [111], this phase is characterized by frequency- and amplitude-dependent susceptibility and extremely slow spin dynamics. In the zero-temperature limit, it extends to about 67 mT (the internal field H(int)≃52  mT), a...