Evidence for the singlet-dimer ground state in an S = 1 antiferromag netic bond alternating chain

Abstract

Susceptibility, ESR and magnetization measurements have been performed on si ngle crystals of an S=1 bond alternating chain compound: [Ni(333-tet)(μ-NO _2)](ClO_4) (333-tet = N,N'-bis(3-aminopropyl)propane-1,3-diamine) and the c ompound doped with a small amount of Zn. We observed an anomalous angular de pendence in the Zn-doped sample. These behaviors are well explained by the m odel based on the VBS picture for the singlet-dimer phase. The picture impli es that the free spins of S=1 with a positive single-ion anisotropy are indu ced at the edges of the chains without forming the singlet-dimer.

RevTeX, 14pages (preprint.sty) with 5figures, submitted to Phys. R ev. Lett

References in corpus (1)

• Experimental Verification of the Gapless Point in the $S$=1 Antiferromagnetic Bond Alternating Chain

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