Magnetic field effects and magnetic anisotropy in lightly doped La2-xSrxCuO4

M. Matsuda, Masaki Fujita, K. Yamada, R. J. Birgeneau, Y. Endoh, G. Shirane

Research output: Contribution to journalArticlepeer-review

12 Citations (Scopus)

Abstract

The effects of the application of a magnetic field on the diagonal stripe spin-glass phase is studied in lightly doped La2-xSrxCuO4 (x=0.014 and 0.024). With increasing magnetic field, the magnetic elastic intensity at the diagonal incommensurate (DIC) positions (1,±ε,0) decreases as opposed to the increase seen in superconducting samples. This diminution in intensity with increasing magnetic field originates from a spin reorientation transition, which is driven by the antisymmetric exchange term in the spin Hamiltonian. On the other hand, the transition temperature, the incommensurability, and the peak width of the diagonal incommensurate correlations are not changed with magnetic field. This result suggests that the magnetic correlations are determined primarily by the charge disproportionation and that the geometry of the diagonal incommensurate magnetism is also determined by effects - that is, stripe formation - which are not purely magnetic in origin. The Dzyaloshinskii-Moriya antisymmetric exchange is nevertheless important in determining the local spin structure in the DIC stripe phase.

Original languageEnglish
Article number174508
Pages (from-to)1745081-1745086
Number of pages6
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume66
Issue number17
Publication statusPublished - 2002 Nov 1
Externally publishedYes

ASJC Scopus subject areas

  • Condensed Matter Physics

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