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Crystal distortions in geometrically frustrated ACr2O4 (A = Zn,Cd)

S-H Lee1, G Gasparovic2, C Broholm3, M Matsuda4, J-H Chung2, Y J Kim5, H Ueda6, G Xu7, P Zschack8, K Kakurai4, H Takagi9, W Ratcliff2, T H Kim10 and S-W Cheong11

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In this paper, we discuss neutron and synchrotron x-ray diffraction data obtained from single crystals of ACr2O4 (A = Zn, Cd). The Cr spinels undergo three-dimensional spin-Peierls transitions at low temperatures that involve cubic-to-tetragonal lattice distortions and magnetic long-range ordering. Our results show that the magnetic structures selected by these systems are closely related to the lattice distortions that are undertaken.


PACS

75.25.+z Spin arrangements in magnetically ordered materials (including neutron and spin-polarized electron studies, synchrotron-source x-ray scattering, etc.)

75.30.Kz Magnetic phase boundaries (including magnetic transitions, metamagnetism, etc.)

61.66.Fn Inorganic compounds

Subjects

Condensed matter: electrical, magnetic and optical

Condensed matter: structural, mechanical & thermal

Dates

Issue 14 (11 April 2007)

Received 24 October 2006

Published 23 March 2007



  1. Crystal distortions in geometrically frustrated ACr2O4 (A = Zn,Cd)

    S-H Lee et al 2007 J. Phys.: Condens. Matter 19 145259

  2. A new layer compound Nb4SiC3 predicted from first-principles theory

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    Jingyun Zhang and Jer-lai Kuo 2009 J. Phys.: Condens. Matter 21 015402

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    A V Karpov et al 2008 J. Phys. G: Nucl. Part. Phys. 35 035104

  6. The de Finetti theorem for test spaces

    Jonathan Barrett and Matthew Leifer 2009 New J. Phys. 11 033024

  7. Observation of phasons in the magnetic shape memory alloy Ni2MnGa

    S. M. Shapiro et al 2007 EPL 77 56004

  8. Discovery of the Energetic Pulsar J1747–2809 in the Supernova Remnant G0.9+0.1

    F. Camilo et al 2009 ApJ 700 L34

  9. Excited-state to excited-state transition of hydrogen-like ions by impact of charged particles

    D P Dewangan and H S Chakraborty 1991 J. Phys. B: At. Mol. Opt. Phys. 24 L263

  10. Comment on the 'Analytic evaluation of the B1B cross sections'

    L J Dube et al 1990 J. Phys. B: At. Mol. Opt. Phys. 23 L711

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