Magnetic ordering and magnetodielectric phenomena in CoSeO$_4$

Brent C. Melot; Lucy E. Darago; Ram Seshadri; Abby Goldman; Joshua D. Furman; Efrain E. Rodriguez

doi:10.1088/0953-8984/22/50/506003

Magnetic ordering and magnetodielectric phenomena in CoSeO$_4$

Materials Science 2012-02-02 v1

Authors: Brent C. Melot , Lucy E. Darago , Ram Seshadri , Abby Goldman , Joshua D. Furman , Efrain E. Rodriguez

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Abstract

CoSeO $_4$ has a structure consisting of edge-sharing chains of Co $^{2+}$ octahedra which are held together by SeO $_4^{2-}$ tetrahedra via shared oxygen atoms at the edges of the octahedra. DC magnetization measurements indicate a transition to an ordered state below 30 K. Powder neutron diffraction refinements suggest an ordered state with two unique antiferrromagnetic chains within the unit cell. Isothermal magnetization measurements indicate a temperature-dependent field-induced magnetic transition below the ordering temperature. From neutron diffraction, we find this corresponds to a realignment of spins from the canted configuration towards the c-axis. The dielectric constant shows a change in slope at the magnetic ordering temperature as well as a quadratic dependence on the external magnetic field.

Keywords

magnetic ordering magnetodielectric effect neutron diffraction antiferromagnetic chain field-induced transition

Cite

@article{arxiv.1003.3702,
  title  = {Magnetic ordering and magnetodielectric phenomena in CoSeO$_4$},
  author = {Brent C. Melot and Lucy E. Darago and Ram Seshadri and Abby Goldman and Joshua D. Furman and Efrain E. Rodriguez},
  journal= {arXiv preprint arXiv:1003.3702},
  year   = {2012}
}

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7 pages, 10 figures

Magnetic ordering and magnetodielectric phenomena in CoSeO$_4$

Abstract

Keywords

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