Pressure effects on the magnetic transition temperature in ordered double perovskites

Di Castro, D.; Dore, P.; Khasanov, R.; Keller, H.; Mahadevan, P.; Ray, Sugata; Sarma, D.D.; Postorino, P.

doi:10.1103/PhysRevB.78.184416

Pressure effects on the magnetic transition temperature in ordered double perovskites

Di Castro D, Dore P, Khasanov R, Keller H, Mahadevan P, Ray S, Sarma DD & Postorino P

Citation

Di Castro, D., Dore, P., Khasanov, R., Keller, H., Mahadevan, P., Ray, S., … Postorino, P. (2008). Pressure effects on the magnetic transition temperature in ordered double perovskites. Physical Review B, 78(18), 184416 (5 pp.). https://doi.org/10.1103/PhysRevB.78.184416

Persistent URL https://www.dora.lib4ri.ch/psi/islandora/object/psi:19090

A study of the pressure effect on the Curie temperature in polycrystalline ordered double perovskites was carried out by measuring the temperature dependence of the magnetization in isoelectronic Sr₂FeMoO₆, Ba₂FeMoO₆, and Ca₂FeMoO₆, and in W-substituted Sr₂FeMo_1−xW_xO₆ with x=0.70. Pressure up to approximately 10 kbar induces an increase in the Curie temperature in all the samples with different rate: dT_c/dp results to be 1.7(2) K/kbar for Ba₂FeMoO₆, 0.60(8) K/kbar for Sr₂FeMoO₆, 0.25(8) K/kbar for Ca₂FeMoO₆, and 0.7(1) K/kbar for the W-substituted sample. The results are interpreted in terms of the different lattice structure and cell volume of the investigated systems. A manganitelike model was only partially successful in explaining the observed pressure behavior, thus, pointing out the different nature of the magnetic interaction in doped manganites and in ordered double perovskites.