Dielectric and magnetocaloric study of TmCrO3

Dielectric and magnetocaloric measurements are carried out for the chromite TmCrO3. This oxide was reported to be multiferroic below the Néel temperature (TN) of ~125 K, likely due to a structural transformation. The dielectric response shows large dielectric constants below 300 K. However, from the...

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Bibliographic Details
Published in:Journal of alloys and compounds 2019-10, Vol.804, p.364-369
Main Authors: Yoshii, Kenji, Ikeda, Naoshi
Format: Article
Language:English
Subjects:
Chromite
Current carriers
Electric dipoles
Ferroelectric materials
Ferroelectricity
Magnetic transitions
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Summary:Dielectric and magnetocaloric measurements are carried out for the chromite TmCrO3. This oxide was reported to be multiferroic below the Néel temperature (TN) of ~125 K, likely due to a structural transformation. The dielectric response shows large dielectric constants below 300 K. However, from the analyses of loss tangent, AC conductivity and dielectric modulus, this behavior is rooted in hopping of charge carriers rather than electric dipoles, as proposed for some other chromites. No dielectric anomaly is found at TN. The magnetocaloric effect shows that the magnetic transitions at TN as well as the spin reorientation temperature are of a second order. This result strongly suggests the absence of magnetostructural transition at TN in accord with no observation of ferroelectric transition at this temperature.
ISSN:0925-8388
1873-4669
DOI:10.1016/j.jallcom.2019.06.359