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Spin-Peierls Magnet CuGeO3

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Itinerant Electron Magnetism: Fluctuation Effects

Part of the book series: NATO Science Series ((ASHT,volume 55))

Abstract

The study of the magnetic and resonance properties of the single crystal CuGeO3were initiated by Petrakovskii and co-authors who first discovered the sharp decrease of the magnetic susceptibility for three main axes of the crystal at the temperature below 14 K. Later Hase and co-authors also observed the similar effect and interpreted it as a spin-Peierls transition. The effect was interpreted in terms of the S=1/2 uniform antiferromagnetic chain which is settled down in the 3D crystal below some critical temperature, and a second order phase transition to a dimerizated singlet state with the energy gap spectrum of magnetic excitations is likely to arise. The main investigations proving that the CuGeO3crystal is the spin-Peierls magnet are discussed in this review with the special emphasis on the following facts: the singletization of the ground magnetic state, the presence of the structural phase transition corresponding to the lattice doubling along the axis of the chain, the energy gap character of the magnetic excitation spectrum, the anomaly of specific heat at the transition temperature, and the specification of the magnetic phase diagram. The magnetoelastic properties of the CuGeO3crystal arealso discussed here.

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Author information

Authors and Affiliations

  1. Institute of Physics SB RAS, 660036, Krasnoyarsk, Russia

    G. A. Petrakovskii

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  1. G. A. Petrakovskii
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Editors and Affiliations

  1. Theoretische Physik III, Ruhr-Universität Bochum, Bochum, Germany

    D. Wagner  & W. Brauneck  & 

  2. A.A. Bochvar Institute for Inorganic Materials and State Center for Condensed Matter Physics, Moscow, Russia

    A. Solontsov

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Petrakovskii, G.A. (1998). Spin-Peierls Magnet CuGeO3 . In: Wagner, D., Brauneck, W., Solontsov, A. (eds) Itinerant Electron Magnetism: Fluctuation Effects. NATO Science Series, vol 55. Springer, Dordrecht. https://doi.org/10.1007/978-94-011-5080-4_27

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  • DOI: https://doi.org/10.1007/978-94-011-5080-4_27

  • Publisher Name: Springer, Dordrecht

  • Print ISBN: 978-0-7923-5203-7

  • Online ISBN: 978-94-011-5080-4

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