3 years ago

Structure, magnetic and dielectric properties in nano-crystalline Yb CoMnO . (arXiv:2003.07872v1 [cond-mat.str-el])

Ilyas Noor Bhatti, Imtiaz Noor Bhatti, Rabindra Nath Mahato, M. A. H. Ahsan
Structural, magnetic and dielectric properties have been studied for Yb CoMnO . Nano-crystalline sample of Yb CoMnO synthesized by sol-gel method and structural analysis shows that the sample crystallizes in monoclinic crystal structure with \textit{P2 /n} phase group. To understand the charge state of Co, Mn and Yb we have performed the XPS study. Magnetic study shows that the sample undergoes a paramagnetic to ferromagnetic phase transition around 56 K and an additional magnetic ordering at a lower temperature around 14 K due to ordering of Yb magnetic ions. Temperature dependent Raman study reveals that spin-phonon interaction is present in this material. Further, we have studied the dielectric properties of this material. We observed that the material shows a relaxation behavior that obeys the thermally activated relaxation mechanism. Impedance spectroscopy reveals that the material shows non-Debye's behavior. AC conductivity study is performed to understand the conduction mechanics which involve the quantum mechanical tunneling phenomenon.

Publisher URL: http://arxiv.org/abs/2003.07872

DOI: arXiv:2003.07872v1

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