Magnetic phase transitions in SmCoAsO
| Autor: | Awana, V. P. S., Nowik, I., Pal, Anand, Yamaura, K., Takayama-Muromachi, E., Felner, I. |
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| Rok vydání: | 2010 |
| Předmět: | |
| Zdroj: | Phys. Rev. B 81, 212501 (2010) |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1103/PhysRevB.81.212501 |
| Popis: | 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 TC=57 K with a small saturation moment of 0.15muB/Co. Reorientation of the Co moment to an antiferromagnetic state is obtained at TN2=45 K. The relative high paramagnetic effective moment Peff=1.57 MuB/Co indicates an itinerant ferromagnetic state of the Co sublattice. The third magnetic transition at TN1=5 K is observed clearly in the specific-heat study only. Both magnetic and 57Fe Mossbauer studies show that substitution of small quantities of Fe for Co was unsuccessful. Comment: 10pages text+Figures: comments welcome (awana@mail.nplindia.ernet.in) |
| Databáze: | arXiv |
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