Direct observation of the energy gap generating the 13 magnetization plateau in the spin-12 trimer chain compound Cu3(P2O6OD)2 by inelastic neutron scattering measurements

Masashi Hase, Masaaki Matsuda, Kazuhisa Kakurai, Kiyoshi Ozawa, Hideaki Kitazawa, Naohito Tsujii, Andreas Dönni, Masanori Kohno, and Xiao Hu
Phys. Rev. B 76, 064431 – Published 29 August 2007

Abstract

We studied magnetism of Cu3(P2O6OD)2 using inelastic neutron scattering measurements on a powder sample. This cuprate has spin-12 trimer chains with J1J2J2 interactions, where J1 and J2 denote two antiferromagnetic (AF) exchange interaction parameters, showing a 13 magnetization plateau. We observed an energy gap of 9.8meV (114K), which generated the magnetization plateau. The gap corresponds to singlet-triplet-like excitation of an AF dimer formed by the dominant J1 interaction. We determined the AF exchange interaction parameters J1=111K and J2=30K, which can reproduce the gap value as well as the magnetization.

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  • Received 3 June 2007

DOI:https://doi.org/10.1103/PhysRevB.76.064431

©2007 American Physical Society

Authors & Affiliations

Masashi Hase1,*, Masaaki Matsuda2, Kazuhisa Kakurai2, Kiyoshi Ozawa1, Hideaki Kitazawa1, Naohito Tsujii1, Andreas Dönni1, Masanori Kohno1, and Xiao Hu1

  • 1National Institute for Materials Science (NIMS), 1-2-1 Sengen, Tsukuba, Ibaraki 305-0047, Japan
  • 2Japan Atomic Energy Agency (JAEA), 2-4 Shirakata Shirane, Tokai, Naka, Ibaraki 319-1195, Japan

  • *hase.masashi@nims.go.jp

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Vol. 76, Iss. 6 — 1 August 2007

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