Magnetic phase transitions in SmCoAsO

V. P. S. Awana; I. Nowik; Anand Pal; K. Yamaura; E. Takayama-Muromachi; I. Felner

doi:10.1103/PhysRevB.81.212501

Magnetic phase transitions in SmCoAsO

Superconductivity 2015-05-18 v3 Strongly Correlated Electrons

Authors: V. P. S. Awana , I. Nowik , Anand Pal , K. Yamaura , E. Takayama-Muromachi , I. Felner

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Abstract

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.

Keywords

magnetic structure magnetic phase transitions ferromagnetism

Cite

@article{arxiv.1001.3719,
  title  = {Magnetic phase transitions in SmCoAsO},
  author = {V. P. S. Awana and I. Nowik and Anand Pal and K. Yamaura and E. Takayama-Muromachi and I. Felner},
  journal= {arXiv preprint arXiv:1001.3719},
  year   = {2015}
}

Comments

10pages text+Figures: comments welcome (awana@mail.nplindia.ernet.in)

Magnetic phase transitions in SmCoAsO

Abstract

Keywords

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