Magnetic phase transitions and magnetic entropy in the XY antiferromagnetic pyrochlores (Er_1-x Y _x )₂Ti₂O_7.

ABSTRACT: We present the results of experimental determination of the heat capacity of the pyrochlore Er₂Ti₂O₇ as a function of temperature (0.35-300 K) and magnetic field (up to 9 T), and for magnetically diluted solid solutions of the general formula (Er_1-x Y _x )₂Ti₂O₇ (x≤0.471). On either doping or increase of magnetic field, or both, the Néel temperature first shifts to lower temperature until a critical point above which there is no well-defined transition but a Schottky-like anomaly associated with the splitting of the ground state Kramers doublet. By taking into account details of the lattice contribution to the heat capacity, we accurately isolate the magnetic contribution to the heat

SUBMITTER: Niven JF 

PROVIDER: S-EPMC4197470 | biostudies-literature | 2014 Nov

REPOSITORIES: biostudies-literature