Magnetic field dependence of incommensurate SDW transition in (TMTTF)2Br

A. Ishikawa, N. Matsunaga, K. Nomura, T. Nakamura, T. Takahashi, G. Saito

Research output: Contribution to journalConference articlepeer-review

Abstract

Resistivity measurements were performed on (TMTTF)2Br under pressure. Magnetic field was applied along c*-axis up to 16 T. Above 0.5 GPa, (TMTTF)2Br exhibits incommensurate spin density wave (ISDW) transition at low temperature. With increasing pressure, spin density wave (SDW) transition temperature TSDW decreases from 19.5 K at 0.5 GPa to 12.5 K at 2.1 GPa. In the incommensurate SDW phase, with increasing magnetic field, TSDW increases quadratically and the coefficient of quadratic term increases with increasing pressure. These results are qualitatively consistent with the prediction of the mean-field theory based on the imperfection of the nesting of Fermi surface. The relation between the coefficient of the quadratic term and TSDW at zero magnetic field can be explained by the mean-field theory with taking into account the reduction of the coupling constant N(0)I by pressure.

Original languageEnglish
Pages (from-to)65-66
Number of pages2
JournalSynthetic Metals
Volume133-134
DOIs
Publication statusPublished - 2003 Mar 13
EventISCOM 2001 - Rusutsu, Hokkaido, Japan
Duration: 2001 Sep 102001 Sep 14

Keywords

  • Magnetoresistance
  • Spin density wave
  • Transport measurement

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

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