Pressure effects on magnetic properties of LaMnO3 and YMnO3

Author:

Panfilov A. S.1,Grechnev G. E.1,Pashchenko V. A.1,Prabhakaran D.2

Affiliation:

1. B. Verkin Institute for Low Temperature Physics and Engineering of the National Academy of Sciences of Ukraine Kharkiv 61103 1 , Ukraine

2. Department of Physics, Clarendon Laboratory, University of Oxford 2 , Parks road, Oxford OX1 3PU, United Kingdom

Abstract

The magnetic susceptibility χ of RMnO3 (R = La, Y) manganites was measured for paramagnetic phase as a function of the hydrostatic pressure P up to 2 kbar at some fixed temperature in the range from 78 to 300 K. A pronounced magnitude of the pressure effect dln χ/dP was found to be positive in sign for LaMnO3 and negative for YMnO3, both being strongly temperature dependent. Analysis of the experimental data, based on the Curie-Weiss behavior of χ(Τ), allowed to estimate the pressure derivative of the paramagnetic Curie temperature to be dΘ/dP = (0.25 ± 0.03) and −(2.4 ± 0.4) K/kbar for LaMnO3 and YMnO3, respectively.

Publisher

AIP Publishing

Subject

General Physics and Astronomy,Physics and Astronomy (miscellaneous)

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