期刊
PHYSICAL REVIEW B
卷 81, 期 21, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.81.212501
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资金
- Israel Science Foundation (ISF) [Bikura 459/09]
- Klachky Foundation for Superconductivity
- Indo-Japan DST-JSPS
- CSIR-NET
Magnetization, x-ray diffraction, and specific-heat measurements reveal that SmCoAsO undergoes three magnetic phase transitions. A ferromagnetic transition attributed to the Co ions, emerges at T(C)=57 K with a small saturation moment of similar to 0.15 mu(B)/Co. Reorientation of the Co moment to an antiferromagnetic state is obtained at T(N2)=45 K. The relative high paramagnetic effective moment P(eff)=1.57 mu(B)/Co indicates an itinerant ferromagnetic state of the Co sublattice. The third magnetic transition at T(N1)=5 K is observed clearly in the specific-heat study only. Both magnetic and (57)Fe Mossbauer studies show that substitution of small quantities of Fe for Co was unsuccessful.
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