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Spin-Peierls transition in the S=12 compound TiPO4 featuring large intrachain coupling

J. M. Law, C. Hoch, R. Glaum, I. Heinmaa, R. Stern, J. Kang, C. Lee, M.-H. Whangbo, and R. K. Kremer
Phys. Rev. B 83, 180414(R) – Published 23 May 2011

Abstract

We investigated the magnetic and structural properties of the quasi-one-dimensional 3d1 quantum chain system TiPO4 (J~ 965 K) by magnetic susceptibility, heat capacity, electron spin resonance, x-ray diffraction, and nuclear magnetic resonance (NMR) measurements, and by density functional theory (DFT) calculations. TiPO4 undergoes two magnetostructural phase transitions, one at 111 K and the other at 74 K. Below 74 K, NMR detects two different P31 signals and the magnetic susceptibility vanishes, while DFT calculations evidence a bond alternation of the Ti-Ti distances within each chain. Thus, the 74 K phase transition is a spin-Peierls transition which evolves from an incommensurate phase existing between 111 and 74 K.

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  • Received 28 February 2011

DOI:https://doi.org/10.1103/PhysRevB.83.180414

©2011 American Physical Society

Authors & Affiliations

J. M. Law1,2,*, C. Hoch1, R. Glaum3, I. Heinmaa4, R. Stern4, J. Kang5, C. Lee5, M.-H. Whangbo5, and R. K. Kremer1

  • 1Max Planck Institut für Festkörperforschung, Heisenbergstrasse 1, D-70569 Stuttgart, Germany
  • 2Physics Department, Loughborough University, Loughborough, Leicestershire, United Kingdom
  • 3Institut für Anorganische Chemie, Universität Bonn, D-53121 Bonn, Germany
  • 4National Institute of Chemical Physics and Biophysics, EE-12618 Tallinn, Estonia
  • 5Department of Chemistry, North Carolina State University, Raleigh, North Carolina 27695-8204, USA

  • *j.law@fkf.mpg.de

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Issue

Vol. 83, Iss. 18 — 1 May 2011

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