Low-temperature structural phase transition of the Jahn-Teller type in DyBa2Cu3O7-δ

V. P. Dyakonov, L. P. Kozeeva, G. G. Levchenko, V. I. Markovich, A. A. Pavljuk, Ju F. Revenko, I. M. Fita

Research output: Contribution to journalArticlepeer-review

Abstract

Temperature and field dependences of the magnetic susceptibility of DyBa2Cu3O6.2 single crystals and DyxY1-xBa2Cu 3O7-δ (δ≈0.7, 0.7≤x≤1.0) ceramics were studied in a permanent magnetic field up to 20 kOe at 0.4-4.2 K. The jump-like singularity is observed at all concentrations of Dy3+ ion in ceramics and in the case of a single crystal in the χ(T)H dependence (H≠0). The jump temperature and its magnitude are determined as a function of magnetic field. The dependences of electric resistance and magnetoresistance also exhibit peculiarities characteristic of the structural phase transition. The presence of hysteresis in χ(T)H in the vicinity of Tt and singularities of thermograms are the evidence for the first-order phase transition which can be regarded as the cause of the magnetic susceptibility jumps.

Original languageEnglish
Pages (from-to)23-28
Number of pages6
JournalPhysica C: Superconductivity and its Applications
Volume208
Issue number1-2
DOIs
StatePublished - 1 Apr 1993
Externally publishedYes

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