skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

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

Abstract

We use neutron scattering to study the lattice and magnetic structure of the layered half-doped manganite Pr0.5Ca1.5MnO4. On cooling from high temperature, the system first becomes chargeand 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

Authors:
 [1];  [1];  [1];  [1];  [2];  [2];  [1];  [3];  [3];  [4]
  1. ORNL
  2. National Institute of Standards and Technology (NIST)
  3. Spin Superstructure Project, ERATO, Japan Science and Technology, Tsukuba 305-85
  4. University of Tokyo, Tokyo, Japan
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); High Flux Isotope Reactor
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
931826
DOE Contract Number:
DE-AC05-00OR22725
Resource Type:
Journal Article
Resource Relation:
Journal Name: Proceedings of the National Academy of Sciences; Journal Volume: 104; Journal Issue: 26
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; NEUTRONS; SCATTERING; SPIN; ANTIFERROMAGNETISM; charge/orbital ordering; AF; single layer manganite; spin-lattice coupling

Citation Formats

Chi, Songxue, Ye, Feng, Dai, Pengcheng, Fernandez-Baca, Jaime A, Huang, Q., Lynn, J. W., Plummer, E Ward, Mathieu, R., Kaneko, Y., and Tokura, Y. Effect of antiferromagnetic spin correlations on lattice distortion and charge ordering in Pr0.5Ca1.5MnO4. United States: N. p., 2007. Web. doi:10.1073/pnas.0704303104.
Chi, Songxue, Ye, Feng, Dai, Pengcheng, Fernandez-Baca, Jaime A, Huang, Q., Lynn, J. W., Plummer, E Ward, Mathieu, R., Kaneko, Y., & Tokura, Y. Effect of antiferromagnetic spin correlations on lattice distortion and charge ordering in Pr0.5Ca1.5MnO4. United States. doi:10.1073/pnas.0704303104.
Chi, Songxue, Ye, Feng, Dai, Pengcheng, Fernandez-Baca, Jaime A, Huang, Q., Lynn, J. W., Plummer, E Ward, Mathieu, R., Kaneko, Y., and Tokura, Y. Mon . "Effect of antiferromagnetic spin correlations on lattice distortion and charge ordering in Pr0.5Ca1.5MnO4". United States. doi:10.1073/pnas.0704303104.
@article{osti_931826,
title = {Effect of antiferromagnetic spin correlations on lattice distortion and charge ordering in Pr0.5Ca1.5MnO4},
author = {Chi, Songxue and Ye, Feng and Dai, Pengcheng and Fernandez-Baca, Jaime A and Huang, Q. and Lynn, J. W. and Plummer, E Ward and Mathieu, R. and Kaneko, Y. and Tokura, Y.},
abstractNote = {We use neutron scattering to study the lattice and magnetic structure of the layered half-doped manganite Pr0.5Ca1.5MnO4. On cooling from high temperature, the system first becomes chargeand 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},
doi = {10.1073/pnas.0704303104},
journal = {Proceedings of the National Academy of Sciences},
number = 26,
volume = 104,
place = {United States},
year = {Mon Jan 01 00:00:00 EST 2007},
month = {Mon Jan 01 00:00:00 EST 2007}
}
  • The bicollinear antiferromagnetic order experimentally observed in FeTe is shown to be stabilized by the coupling g ~ 12 between monoclinic lattice distortions and the spin-nematic order parameter with B 2g symmetry, within a three-orbital spin-fermion model studied with Monte Carlo techniques. A finite but small value of g ~ 12 is required, with a concomitant lattice distortion compatible with experiments, and a tetragonal-monoclinic transition strongly first order. Remarkably, the bicollinear state found here displays a planar resistivity with the reversed puzzling anisotropy discovered in transport experiments. Orthorhombic distortions are also incorporated, and phase diagrams interpolating between pnictides and chalcogenidesmore » are presented. Here, we conclude that the spin-lattice coupling we introduce is sufficient to explain the challenging properties of FeTe.« less
  • The antiferromagnetic and superconducting properties of a thiospinel Cu[sub 1.5]Co[sub 1.5]S[sub 4] ([ital T][sub [ital N]]=19.0 K, [ital T][sub [ital c]]=2.3 K) have been investigated with [sup 63]Cu NMR (75 MHz), [sup 59]Co NMR (75 MHz), and [sup 59]Co pure quadrupole resonance between [ital T]=1.23 and 150 K. The linear dependence of negative [sup 63]Cu Knight shift ([minus]0.013% at 4.2 K) on the Curie-Weiss-type susceptibility [chi]([ital T]) and nearly independent [sup 59]Co Knight shift (+1.43%) indicate that the [ital d] hole band of Cu at the tetrahedral [ital A] site is mainly responsible for the spin paramagnetism. The spin-lattice relaxationmore » rates ([ital T][sub 1][ital T])[sup [minus]1] of both [sup 63]Cu and [sup 59]Co are significantly enhanced with lowering temperature below [similar to]100 K, similar to those observed in high-[ital T][sub [ital c]] copper oxygen perovskite superconductors, which are associated with the growth of antiferromagntic spin correlations at low temperatures. Below [ital T][sub [ital c]], [ital T][sub 1][sup [minus]1] of the fractional Co at the octahedral [ital B] site, which increases from [similar to]0% at 0.65[ital T][sub [ital c]] to [similar to]30% at 0.5[ital T][sub [ital c]], shows a rapid decrease, indicating a partial formation of the superconducting energy gap. On the other hand, [ital T][sub 1][sup [minus]1] of the dominant part of Co follows a Korringa-like relation down to 0.5[ital T][sub [ital c]], suggesting it is in a gapless superconducting state, probably due to strong antiferromagnetic spin correlations.« less
  • The oxygen-deficient double perovskite YBaCo{sub 2} O{sub 5} , containing corner-linked CoO{sub 5} square pyramids as principal building units, undergoes a paramagnetic to antiferromagnetic spin ordering at 330 K. This is accompanied by a tetragonal to orthorhombic distortion. Below 220 K orbital ordering and long-range Co{sup 2+}/Co {sup 3+} charge ordering occur as well as a change in the Co{sup 2+} spin state from low to high spin. This transition is shown to be very sensitive to the oxygen content of the sample. To our knowledge this is the first observation of a spin-state transition induced by long-range orbital andmore » charge ordering. (c) 2000 The American Physical Society.« less
  • Cited by 21