Dhanasekhar, C., Das, A. K., Singh, Ripandeep, Das, A., Giovannetti, G., Khomskii, D. and Venimadhav, A. (2017). Switching from pyroelectric to ferroelectric order in Ni-doped CaBaCo4O7. Phys. Rev. B, 96 (13). COLLEGE PK: AMER PHYSICAL SOC. ISSN 2469-9969

Full text not available from this repository.

Abstract

We report ferroelectric ordering in Ni-substituted CaBaCo4O7. Magnetization showed ferrimagnetic transition at 60 K and an additional magnetic anomaly is found at similar to 82 K. The enhanced antiferromagnetic interactions and decrease in saturation magnetization are noticed with Ni substitution. The dielectric and pyroelectric measurements illustrate strong coupling between spin and charge degrees of freedom. Ferroelectric behavior is confirmed with enhanced ordering temperature (similar to 82 K) and saturation polarization (250 mu C/m(2)). Neutron diffraction has revealed an increase in c-lattice parameter in the Ni sample. All the Co/Ni moments are reoriented in the a direction. A transition from a noncollinear ferrimagnetic to a collinear ferrimagnetic spin order, with up arrow up arrow down arrow down arrow antiferromagnetic ordering in the kagome layer, is observedwith substitution. This results in the appearance of unequal bond distances in a two-dimensional collinear layer; most likely this is responsible for the transition from pyroelectric to ferroelectric, with the possibility of switching of electric polarization.

Item Type: Journal Article
Creators:
CreatorsEmailORCIDORCID Put Code
Dhanasekhar, C.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Das, A. K.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Singh, RipandeepUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Das, A.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Giovannetti, G.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Khomskii, D.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Venimadhav, A.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
URN: urn:nbn:de:hbz:38-214399
DOI: 10.1103/PhysRevB.96.134413
Journal or Publication Title: Phys. Rev. B
Volume: 96
Number: 13
Date: 2017
Publisher: AMER PHYSICAL SOC
Place of Publication: COLLEGE PK
ISSN: 2469-9969
Language: English
Faculty: Unspecified
Divisions: Unspecified
Subjects: no entry
Uncontrolled Keywords:
KeywordsLanguage
SINUSOIDAL TEMPERATURE WAVES; TOTAL-ENERGY CALCULATIONS; NONPYROELECTRIC CURRENTS; BASIS-SET; MAGNETISMMultiple languages
Materials Science, Multidisciplinary; Physics, Applied; Physics, Condensed MatterMultiple languages
Refereed: Yes
URI: http://kups.ub.uni-koeln.de/id/eprint/21439

Downloads

Downloads per month over past year

Altmetric

Export

Actions (login required)

View Item View Item