Browsing by Author "Ghigna P."

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  • CdEr2Se4: A new erbium spin ice system in a spinel structure 
    Lago J.; Živković I.; Malkin B.; Rodriguez Fernandez J.; Ghigna P.; Dalmas De Réotier P.; Yaouanc A.; Rojo T. (2010)
    Here we present a detailed study of the spinel CdEr2Se4 and show it to be a new instance of spin ice, the first one in an erbium material and the first one in a spinel. Definitive experimental evidence comes from the ...
  • Dynamical Dzyaloshinsky-Moriya interaction in KCuF3 
    Eremin M.; Zakharov D.; Von Nidda H.; Eremina R.; Shuvaev A.; Pimenov A.; Ghigna P.; Deisenhofer J.; Loidl A. (2008)
    The spin dynamics of the prototypical quasi-one-dimensional antiferromagnetic Heisenberg spin S=1/2 chain KCuF3 is investigated by electron spin resonance spectroscopy. Our analysis shows that the peculiarities of the spin ...
  • Optical evidence for symmetry changes above the Néel temperature of KCuF3 
    Deisenhofer J.; Leonov I.; Eremin M.; Kant C.; Ghigna P.; Mayr F.; Iglamov V.; Anisimov V.; Van Der Marel D. (2008)
    We report on optical measurements of the 1D Heisenberg antiferromagnet KCuF3. The crystal-field excitations of the Cu2+ ions have been observed and their temperature dependence can be understood in terms of magnetic and ...

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