Magnetic field-induced change of modulated antiferromagnetic correlations for La1.85 Sr0.15 Cu1 - y Zny O4 with y = 0.004, 0.02

Barry L. Winn, Hiroyuki Kimura, Dimitri N. Argyriou, Naofumi Aso, Kazuma Hirota, Maiko Kofu, Masato Matsuura

Research output: Contribution to journalArticlepeer-review

Abstract

In the high temperature superconductor La1.85 Sr0.15 Cu1 - y Zny O4, we directly observed modulated antiferromagnetic correlations of Cu spin orientations via elastic (y = 0.02) and low energy inelastic (y = 0.004) magnetically scattered neutron intensity. A magnetic field was applied perpendicular to the CuO2 plane to change these correlations. For y = 0.02 we confirmed an earlier observation of elastic scattered intensity at 2 K and 0 T. The component of the magnetic moment perpendicular to the scattering vector is μ⊥ Q < 0.065 μB, and is enhanced by 32% when a 5.5 T field is applied. For y = 0.004, we observed a 145% enhancement of 3 meV spin excitations when a 14.5 T magnetic field is applied at 1.6 K. However, we observed no elastic scattered intensity at either 0 or 14.5 T.

Original languageEnglish
Pages (from-to)153-155
Number of pages3
JournalPhysica B: Condensed Matter
Volume385-386 I
DOIs
Publication statusPublished - 2006 Nov 27

Keywords

  • High temperature superconductivity
  • Impurity
  • Magnetic field
  • Magnetic neutron scattering

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering

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