| Numéro |
J. Phys. IV France
Volume 7, Numéro C2, Avril 1997
Proceedings of the 9th International Conference on X-Ray Absorption Fine Structure
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|---|---|---|
| Page(s) | C2-529 - C2-530 | |
| DOI | https://doi.org/10.1051/jp4/1997084 | |
Proceedings of the 9th International Conference on X-Ray Absorption Fine Structure
J. Phys. IV France 7 (1997) C2-529-C2-530
DOI: 10.1051/jp4/1997084
1 CRISMAT, ISMRA, 14050 Caen cedex, France
2 CMPL, University of Rajasthan, Jaipur 302004, India
3 ESRF, BP. 220, 38043 Grenoble cedex 09, France
© EDP Sciences 1997
J. Phys. IV France 7 (1997) C2-529-C2-530
DOI: 10.1051/jp4/1997084
Electronic Structure of Manganese in GMR Perovskites as Seen by the Soft X-Ray Absorption Spectroscopy
F. Studer1, O. Toulemonde1, V. Caignaert1, P. Srivastava2, J.B. Goedkoop3 and N.B. Brookes31 CRISMAT, ISMRA, 14050 Caen cedex, France
2 CMPL, University of Rajasthan, Jaipur 302004, India
3 ESRF, BP. 220, 38043 Grenoble cedex 09, France
Abstract
The changes in the electronic structure of manganese perovskites Ln1-xAxMnO3 (Ln = La, Pr ; A = Ca, Sr, Ba;
0 ≤ x ≤ 0.33) exhibiting GMR properties have been investigated above and below the transition temperature by soft X-ray
Absorption Spectroscopy at Mn L2,3-edge. The analysis of the Mn L3-edges both in the paramagnetic-insulating state and
in the metallic-ferromagnetic state have been performed by a linear combination of a Mn(IV) reference and two simulated
spectra corresponding to High Spin and Low Spin Mn(III). The results of the simulation, although not perfect, indicate
that, upon crossing the transition, a change occurs in the ratio HS/LS of Mn(III) states.
© EDP Sciences 1997