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Magnetic and transport properties of i-R-Cd icosahedral quasicrystals (R=Y,Gd-Tm)
Physical Review B
  • Tai Kong, Iowa State University
  • Sergey L. Bud'ko, Iowa State University
  • Anton Jesche, Iowa State University
  • John McArthur, Quantum Design Japan
  • Andreas Kreyssig, Iowa State University
  • Alan I. Goldman, Iowa State University
  • Paul C. Canfield, Iowa State University
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We present a detailed characterization of the recently discovered i-R-Cd (R=Y,Gd-Tm) binary quasicrystals by means of x-ray diffraction, temperature-dependent dc and ac magnetization, temperature-dependent resistance, and temperature-dependent specific heat measurements. Structurally, the broadening of x-ray diffraction peaks found for i-R-Cd is dominated by frozen-in phason strain, which is essentially independent of R. i-Y-Cd is weakly diamagnetic and manifests a temperature-independent susceptibility. i-Gd-Cd can be characterized as a spin glass below 4.6 K via dc magnetization cusp, a third order nonlinear magnetic susceptibility peak, a frequency-dependent freezing temperature, and a broad maximum in the specific heat. i-R-Cd (R=Ho-Tm) is similar to i-Gd-Cd in terms of features observed in thermodynamic measurements. i-Tb-Cd and i-Dy-Cd do not show a clear cusp in their zero-field-cooled dc magnetization data, but instead show a more rounded, broad local maximum. The resistivity for i-R-Cd is of order 300μΩ cm and weakly temperature dependent. The characteristic freezing temperatures for i-R-Cd (R=Gd-Tm) deviate from the de Gennes scaling, in a manner consistent with crystal electric field splitting induced local moment anisotropy.

This article is from Physical Review B 90 (2014): 014424, doi:10.1103/PhysRevB.90.014424. Posted with permission.

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American Physical Society
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Tai Kong, Sergey L. Bud'ko, Anton Jesche, John McArthur, et al.. "Magnetic and transport properties of i-R-Cd icosahedral quasicrystals (R=Y,Gd-Tm)" Physical Review B Vol. 90 (2014) p. 014424
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