Collective magnetic excitation in a single-chain magnet by electron spin resonance measurements

Yugo Oshima, Hiroyuki Nojiri, Kaname Asakura, Toru Sakai, Masahiro Yamashita, and Hitoshi Miyasaka
Phys. Rev. B 73, 214435 – Published 19 June 2006

Abstract

Collective magnetic excitation of the single-chain magnet (SCM) has been observed using high-frequency electron spin resonance (ESR). The observed ESR mode is attributed to the spin wave excitation with strong magnetic anisotropy where its temperature dependence shows the continuous evolution of the short-range spin correlation inside the chain. The uniaxial anisotropy constants and the exchange couplings of the related SCM have been quantitatively deduced from our theoretical analysis. Moreover, the relaxation mechanism of the SCM is found to originate from a collective reversal of spins via the transverse exchange couplings between the molecular units.

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  • Received 19 April 2006

DOI:https://doi.org/10.1103/PhysRevB.73.214435

©2006 American Physical Society

Authors & Affiliations

Yugo Oshima1,4, Hiroyuki Nojiri1,4, Kaname Asakura2,4, Toru Sakai2,4, Masahiro Yamashita3,4, and Hitoshi Miyasaka3,4

  • 1Institute for Materials Research, Tohoku University, Katahira 2-1-1, Sendai, 980-8577, Japan
  • 2Japan Atomic Energy Research Institute (JAERI), SPring-8, Kouto 1-1-1, Hyogo 679-5184, Japan
  • 3Department of Chemistry, Graduate School of Science, Tohoku University, Sendai, 980-8578, Japan
  • 4CREST, Japan Science and Technology Agency (JST), Tokyo 102–8666, Japan

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Issue

Vol. 73, Iss. 21 — 1 June 2006

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