Giant Spin Canting in the S=1/2 Antiferromagnetic Chain [CuPM(NO3)2(H2O)2]n Observed by C13-NMR

A. U. B. Wolter, P. Wzietek, S. Süllow, F. J. Litterst, A. Honecker, W. Brenig, R. Feyerherm, and H.-H. Klauss
Phys. Rev. Lett. 94, 057204 – Published 8 February 2005

Abstract

We present a combined experimental and theoretical study on copper pyrimidine dinitrate [CuPM(NO3)2(H2O)2]n, a one-dimensional S=1/2 antiferromagnet with alternating local symmetry. From the local susceptibility measured by NMR at the three inequivalent carbon sites in the pyrimidine molecule we deduce a giant spin canting, i.e., an additional staggered magnetization perpendicular to the applied external field at low temperatures. The magnitude of the transverse magnetization, the spin canting of (52±4)° at 10 K and 9.3 T, and its temperature dependence are in excellent agreement with exact diagonalization calculations.

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  • Received 7 May 2004

DOI:https://doi.org/10.1103/PhysRevLett.94.057204

©2005 American Physical Society

Authors & Affiliations

A. U. B. Wolter1, P. Wzietek2, S. Süllow1, F. J. Litterst1, A. Honecker3, W. Brenig3, R. Feyerherm4, and H.-H. Klauss1

  • 1Institut für Metallphysik und Nukleare Festkörperphysik, TU Braunschweig, 38106 Braunschweig, Germany
  • 2Laboratoire de Physique des Solides, Université Paris-Sud, 91405 Orsay, France
  • 3Institut für Theoretische Physik, TU Braunschweig, 38106 Braunschweig, Germany
  • 4Hahn-Meitner-Institut GmbH, 14109 Berlin, Germany

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Issue

Vol. 94, Iss. 5 — 11 February 2005

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