Effect of antiferromagnetic spin correlations on lattice distortion and charge ordering in Pr0.5Ca1.5MnO4

  • Songxue Chi
  • , F. Ye
  • , Pengcheng Dai
  • , J. A. Fernandez-Baca
  • , Q. Huang
  • , J. W. Lynn
  • , E. W. Plummer
  • , R. Mathieu
  • , Y. Kaneko
  • , Y. Tokura

Research output: Contribution to journalArticlepeer-review

18 Scopus citations

Abstract

We use neutron scattering to study the lattice and magnetic structure of the layered half-doped manganite Pr0.5Ca1.5MnO 4. On cooling from high temperature, the system first becomes charge-and orbital-ordered (CO/OO) near TCO = 300 K and then develops checkerboard-like antiferromagnetic (AF) order below TN = 130 K. At temperatures above TN but below TCO (TN< T<TCO), the appearance of short-range AF spin correlations suppresses the CO/OO-induced orthorhombic strain, contrasting with other half-doped manganites, where AF order has no observable effect on the lattice distortion. These results suggest that a strong spin-lattice coupling and the competition between AF exchange and CO/OO ordering ultimately determines the low-temperature properties of the system.

Original languageEnglish
Pages (from-to)10796-10801
Number of pages6
JournalProceedings of the National Academy of Sciences of the United States of America
Volume104
Issue number26
DOIs
StatePublished - Jun 26 2007

Keywords

  • CE-type AF order

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