Observation of a half step magnetization in the {Cu3}-type triangular spin ring

Kwang Yong Choi, Yasuhiro H. Matsuda, Hiroyuki Nojiri, U. Kortz, F. Hussain, Ashley C. Stowe, Chris Ramsey, Naresh S. Dalal

Research output: Contribution to journalArticlepeer-review

96 Citations (Scopus)

Abstract

We report pulsed field magnetization and ESR experiments on a {Cu3} nanomagnet, where antiferromagnetically coupled Cu2+ (S=1/2) ions form a slightly distorted triangle. The remarkable feature is the observation of a half step magnetization, hysteresis loops, and an asymmetric magnetization between a positive and a negative field in a fast sweeping external field. This is attributed to an adiabatic change of magnetization. The energy levels determined by ESR unveil that the different mixing nature of a spin chirality of a total S=1/2 Kramers doublet by virtue of Dzyaloshinskii-Moriya interactions is decisive for inducing half step magnetization.

Original languageEnglish
Article number107202
JournalPhysical review letters
Volume96
Issue number10
DOIs
Publication statusPublished - 2006

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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