Lattice strain and heat capacity anomalies at the spin reorientation transitions of ErFeO3 orthoferrite

R. P. Chaudhury, B. Lorenz, C. W. Chu, Ya B. Bazaliy, L. T. Tsymbal

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9 Citations (Scopus)

Abstract

We have investigated the thermal expansivities of an ErFeO3 single crystal along the three crystallographic orientations using a high-resolution capacitance dilatometer and found clear signatures of lattice distortions in the spin rotation region as evidence for strong spin-lattice coupling. The observed lattice strain is consistent with the smooth rotation of the magnetization and it reveals the importance of the magnetoelastic interaction. Heat capacity measurements show a well-defined plateau-like enhancement in the spin re-orientation regime as predicted by the Landau theory of second order phase transitions. The data are used to estimate microscopic anisotropy parameters. Heat capacity is also measured near the low-temperature erbium magnetic ordering transition.

Original languageEnglish
Article number042014
JournalJournal of Physics: Conference Series
Volume150
Issue number4
DOIs
Publication statusPublished - 2009

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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