Structural effects of the spin-state crossover at high temperature in the distorted ErCoO3 cobaltite

We present a neutron powder diffraction study reporting structural evidences of a spin- state crossover beginning at Tss≈575 K in the highly distorted ErCoO3 cobaltite, based on measurements in the temperature range 100 K - 1000 K. Different interrelated changes in the structural evolution upon heat...

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Bibliographic Details
Published inJournal of physics. Conference series Vol. 663; no. 1
Main Authors Padilla-Pantoja, Jessica, García-Muñoz, José Luis, Alonso, J A, Fernandez-Díaz, M T
Format Journal Article
LanguageEnglish
Published Bristol IOP Publishing 27.11.2015
Subjects
Augmentation
High temperature
Neutron diffraction
Physics
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Summary:We present a neutron powder diffraction study reporting structural evidences of a spin- state crossover beginning at Tss≈575 K in the highly distorted ErCoO3 cobaltite, based on measurements in the temperature range 100 K - 1000 K. Different interrelated changes in the structural evolution upon heating have been described, which are driven by an anomalous expansion of the octahedra. The activation of IS or HS spin states brings about an expansion of the CoO6 octahedra (increase of Co-O bond lengths), and the augmentation of the Co-O distances in the a-b plane respect to that along the c-axis. The spin-state crossover extends over a broad temperature interval and can be monitored by an atypical augmentation of the orthorhombic strain.
ISSN:1742-6588
1742-6596
DOI:10.1088/1742-6596/663/1/012005