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High Pressure Measurements on TI2Mn2O7

Published online by Cambridge University Press:  10 February 2011

M. Núñez-Regueiro ,
R. Senis ,
W. Cheikh-Rouhou ,
P. Strobel ,
P. Bordet ,
M. Pernet ,
M. Hanfland ,
B. Martinez  and
J. Fontcuberta
M. Núñez-Regueiro
Affiliation:
Centre de Recherches sur les Très Basses Températures., C.N.R.S., BP166 cedex 09, 38042 Grenoble, France
R. Senis
Affiliation:
Centre de Recherches sur les Très Basses Températures., C.N.R.S., BP166 cedex 09, 38042 Grenoble, France
W. Cheikh-Rouhou
Affiliation:
Centre de Recherches sur les Très Basses Températures., C.N.R.S., BP166 cedex 09, 38042 Grenoble, France
P. Strobel
Affiliation:
Centre de Recherches sur les Très Basses Températures., C.N.R.S., BP166 cedex 09, 38042 Grenoble, France
P. Bordet
Affiliation:
Centre de Recherches sur les Très Basses Températures., C.N.R.S., BP166 cedex 09, 38042 Grenoble, France
M. Pernet
Affiliation:
Laboratoire de Cristallographie, C.N.R.S., BP166 cedex 09, 38042 Grenoble, France
M. Hanfland
Affiliation:
European Synchrotron Radiation Facility, BP 220, 38043 Grenoble, France
B. Martinez
Affiliation:
Centre de Recherches sur les Très Basses Températures., C.N.R.S., BP166 cedex 09, 38042 Grenoble, France
J. Fontcuberta
Affiliation:
ICMAB-CSIC, Campus Universitat Autonoma de Barcelona, Bellaterra 08193, Spain
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Abstract

Transport and structural properties of the colossal magnetoresistance pyrochlore TI2Mn2O7 are studied as a function of applied pressure up to ∼20GPa. This allows us to probe the effect of structural changes on the ferromagnetic transition and the transport properties. We observe a non-monotonous pressure dependence of the ferromagnetic transition temperature. We correlate this unusual variation with the structural parameters that, according to electronic band calculations, are key in controlling the properties of these materials.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 602: Symposium JJ – Magnetoresistive Oxides & Related Materials , 1999 , 41
Copyright
Copyright © Materials Research Society 2000

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