Experimental phase diagra: A quasi-one-dimensional antiferromagnetic spin- Heisenberg ladder

G. Chaboussant, P. Crowell, L. Lévy

Research output: Contribution to journalArticlepeer-review

185 Scopus citations

Abstract

Using magnetization, susceptibility, and spin resonance techniques, three distinct magnetic phases of (Formula presented)((Formula presented)(Formula presented)(Formula presented)(Formula presented)(Formula presented), a spin- ladder, are identified at zero temperature. For magnetic fields below (Formula presented)=7.5 T, the one-dimensional ground state is a valence-bond ordered singlet separated from a triplet band by an energy gap (Formula presented)/(Formula presented)≈g(Formula presented)(Formula presented)/(Formula presented)=10.8 K. For (Formula presented)<H<(Formula presented)=13.2 T, the ground state is probably an antiferromagnetic canted or incommensurate state, and above (Formula presented) the ground state is ferromagnetic. The exchange parameters used to parametrize the magnetic Hamiltonian are determined.

Original languageEnglish (US)
Pages (from-to)3046-3049
Number of pages4
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume55
Issue number5
DOIs
StatePublished - 1997

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