Magnetism of perovskite cobaltites with Kramers rare-earth ions

0431554 - FZÚ 2015 RIV US eng J - Článek v odborném periodiku
Jirák, Zdeněk - Hejtmánek, Jiří - Knížek, Karel - Novák, Pavel - Šantavá, Eva - Fujishiro, H.
Magnetism of perovskite cobaltites with Kramers rare-earth ions.
Journal of Applied Physics. Roč. 115, č. 17 (2014), "17E118-1"-"17E118-3". ISSN 0021-8979. E-ISSN 1089-7550
Grant CEP: GA ČR(CZ) GAP204/11/0713
Institucionální podpora: RVO:68378271
Klíčová slova: perovskite cobaltites * RE * AFM * Schottky anomaly * Zeeman splitting
Kód oboru RIV: BM - Fyzika pevných látek a magnetismus
Impakt faktor: 2.183, rok: 2014

The band-gap insulators RECoO3 (RE¼Nd3+, Sm3+, and Dy3+) with Co3+ ions stabilized in the non-magnetic low-spin state have been investigated by specific heat measurements. The experiments evidence an antiferromagnetic ordering of the rare earths with Neel temperature of TN¼1.25, 1.50, and 3.60 K for NdCoO3, SmCoO3, and DyCoO3, respectively. With increasing external field, the lambda peak in specific heat, indicative of the transition, shifts to lower temperatures and vanishes for field of about 3 T. Starting from this point, a broader Schottky peak is formed, centered in 1 K range, and its position is moved to higher temperatures proportionally to applied field.
Trvalý link: http://hdl.handle.net/11104/0236166