Dwivedi, G D and Kumawat, S M and Yen, Tsung-Wen and Wang, C W and Kakarla, D Chandrasekhar and Joshi, Amish G and Yang, H D and Huang, Shin-Ming and Chou, H (2021) Understanding the correlation between orbital degree of freedom, lattice-striction and magneto-dielectric coupling in ferrimagnetic Mn1.5Cr1.5O4. Journal of Physics-Condensed Matter, 33 (50). Art No-505802. ISSN 0953-8984

Full text not available from this repository. (Request a copy)


Dielectric anomaly observed in cubic Mn1.5Cr1.5O4 around ferrimagnetic ordering temperature (T (N)) suggests a possible magneto-dielectric coupling in the system. This report confirms the presence of a weak but significant magneto-dielectric coupling in the system. The ab initio calculations show a band gap of around 1.2 eV, with Fermi-level closer to the conduction band. The major features of conduction band nearest to the Fermi-level correspond to d ( xz ) and d (3z ) (2) (-r ) (2) orbitals of Mn3+ ion. Temperature-dependent neutron diffraction results show a rapid decay in structural parameters (lattice-striction and transition metal-oxygen bond length) around T (N.) We confirmed that these changes in structural parameters at T (N) are not related to structural transition but the consequences of orbital-ordering of Mn3+. The rapid decay in transition metal-oxygen bond length under internal magnetism of the system shows that magnetism could certainly manipulate the electric dipole moment and hence the dielectric constant of the system. Magneto-striction acts as a link between magnetic and dielectric properties.

Item Type: Article
Subjects: Electronics
Depositing User: Bidhan Chaudhuri
Date Deposited: 17 Dec 2021 07:19
Last Modified: 17 Dec 2021 07:19
URI: http://cgcri.csircentral.net/id/eprint/5269

Actions (login required)

View Item View Item