Magnetic, resonance, and optical properties of Cu3Sm(SeO3)2O2Cl: A rare-earth francisite compoundстатья
Статья опубликована в высокорейтинговом журнале
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Дата последнего поиска статьи во внешних источниках: 26 сентября 2016 г.
Аннотация:In this combined experimental and theoretical paper, we study the properties of Cu3Sm(SeO3)2O2Cl belonging to the francisite family of compounds, which are novel frustrated layered compounds. Cu3Sm(SeO3)2O2Cl is synthesized through a solid state reaction. Characterizations through measurements of magnetization, specific heat, X-band electron spin resonance, and rare-earth optical spectroscopy, establish that the compound orders antiferromagnetically at TN=35K and undergoes a spin-reorientation phase transition at TC=8.5K due to the interplay of anisotropies in transition metal and rare-earth subsystems. The ground state Kramers doublet of Sm is found to split only at T<TC when the exchange field is aligned along the nonzero component of its g factor. Prior to full saturation with Ms≤3μB/f.u., which is reached under application of moderate magnetic field, the magnetization is found to exhibit complicated hysteresis behavior related to field-induced metamagnetic phase transitions. The first principles calculations reveal the hierarchy of exchange interaction parameters in the kagome-type magnetic subsystem of Cu3Sm(SeO3)2O2Cl.