Low Temperature Thermal and Magnetic Properties of Cu-Doped Haldane Gap Antiferromagnet NENP

Tatsuo C. Kobayashi, Hajime Honda, Akihiro Koda, Kiichi Amaya

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

Effects of Cu-impurity are studied by heat capacity and susceptibility measurements down to 30 mK on the Haldane-gap antiferromagnet Ni(C2H8N2)2NO2(ClO4) (NENP). We have observed the characteristic heat capacity and susceptibility which show contributions from free spins of the Cu2+-impurities with S=1/2 and the fractional spin S=1/2 states at the ends of the Ni2+ (S=1)-chain adjacent to the Cu2+-impurities. The present results are explained completely by the phenomenological Hamiltonian for a trimmer of S=1/2 proposed by the ESR study on this system.

Original languageEnglish
Pages (from-to)2609-2613
Number of pages5
Journaljournal of the physical society of japan
Volume64
Issue number7
DOIs
Publication statusPublished - Jul 1995
Externally publishedYes

Keywords

  • Cu-impurity
  • Haldane gap
  • NENP
  • heat capacity
  • low temperature
  • susceptibility

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Fingerprint Dive into the research topics of 'Low Temperature Thermal and Magnetic Properties of Cu-Doped Haldane Gap Antiferromagnet NENP'. Together they form a unique fingerprint.

  • Cite this