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Observation of a sample-dependent 37 K anomaly on the lattice parameters of strontium titanate

Journal Article


Abstract


  • The lattice parameters of tetragonal strontium titanate are determined to about 1 part in 106 with penetrating X-rays. While no peculiarity is detected in a bulk sample, a distinct anomaly at 37 K is observed in an optically polished thin platelet derived from the same single crystal. This suggests that the anomaly is related to a high density of dislocations. A possible mechanism is that dislocations stabilize transverse antiphase boundaries which undergo a ferroelectrie transition near 37 K. If so, this transition stresses the boundaries which then strain the bulk leading to the observed anomaly.

Publication Date


  • 2003

Citation


  • Arzel, L., Hehlen, B., Dénoyer, F., Currat, R., Liss, K. D., & Courtens, E. (2003). Observation of a sample-dependent 37 K anomaly on the lattice parameters of strontium titanate. Europhysics Letters, 61(5), 653-659. doi:10.1209/epl/i2003-00121-4

Scopus Eid


  • 2-s2.0-0037335124

Start Page


  • 653

End Page


  • 659

Volume


  • 61

Issue


  • 5

Abstract


  • The lattice parameters of tetragonal strontium titanate are determined to about 1 part in 106 with penetrating X-rays. While no peculiarity is detected in a bulk sample, a distinct anomaly at 37 K is observed in an optically polished thin platelet derived from the same single crystal. This suggests that the anomaly is related to a high density of dislocations. A possible mechanism is that dislocations stabilize transverse antiphase boundaries which undergo a ferroelectrie transition near 37 K. If so, this transition stresses the boundaries which then strain the bulk leading to the observed anomaly.

Publication Date


  • 2003

Citation


  • Arzel, L., Hehlen, B., Dénoyer, F., Currat, R., Liss, K. D., & Courtens, E. (2003). Observation of a sample-dependent 37 K anomaly on the lattice parameters of strontium titanate. Europhysics Letters, 61(5), 653-659. doi:10.1209/epl/i2003-00121-4

Scopus Eid


  • 2-s2.0-0037335124

Start Page


  • 653

End Page


  • 659

Volume


  • 61

Issue


  • 5