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Magnetic and transport properties of i-R-Cd icosahedral quasicrystals (R=Y, Gd-Tm)

TitleMagnetic and transport properties of i-R-Cd icosahedral quasicrystals (R=Y, Gd-Tm)
Publication TypeJournal Article
Year of Publication2014
AuthorsKong, T, Bud'ko, SL, Jesche, A, McArthur, J, Kreyssig, A, Goldman, AI, Canfield, PC
JournalPhysical Review B
Date Published07
Type of ArticleArticle
ISBN Number1098-0121
Accession NumberWOS:000339446200002
Keywordsdiffraction, earth rhodium borides, field, model, order, spin-glass, susceptibility, symmetry, systems, temperatures

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 300 mu Omega 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.

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