PROTON-SPIN-LATTICE RELAXATION IN THE ANTIFERROMAGNETIC STATE OF [CH3]2NH2MNCL3

BAHCELI S.

SOLID STATE COMMUNICATIONS, vol.83, no.4, pp.279-283, 1992 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 83 Issue: 4
  • Publication Date: 1992
  • Doi Number: 10.1016/0038-1098(92)90272-b
  • Journal Name: SOLID STATE COMMUNICATIONS
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.279-283
  • Ankara University Affiliated: No

Abstract

The proton-spin-lattice relaxation times (T1) in the antiferromagnetic phase of the 1d-antiferromagnetic compound dimethylammonium manganese chloride (DMMC) have been studied theoretically on the basis of the spinwave theory. The hyperfine interaction between the electron-spin system and a proton is assumed to be purely dipolar. In this case, the dominant relaxation processes that can be effective are the first-order Raman scatttering and the second-order three magnon processes. A quantitative calculation has been given for the two-magnon process. The influence of the orthorhombic anisotropy is discussed.