Dominance of magnetic scattering in the electrical-transport of Al70.5Pd22Mn7.5 icosahedral quasicrystal

Jaiswal, Archna; Rawat, R.; Lalla, N. P.

doi:10.1016/j.jnoncrysol.2006.02.006

Cited by 2 publications

(2 citation statements)

References 43 publications

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“…Besides the negative slope of zero-field resistance at room temperature, the resistance of i-R-Cd also exhibits a broad dome at lower temperature, for example, ∼100 K for i-Tb-Cd and ∼40 K for i-Gd-Cd. Although this feature might be affected by metallic Cd, similar dome-shape resistances had been observed in many other quasicrystals as well and was explained by weak localization with strong spinorbit coupling 2,6,50-52 and competing inelastic scattering in the presence of weak localization 53 . It worth pointing out that the existence of such a broad maxima was shown to be closely related to the sample preparation method and the sample quality 25,54 .…”

Section: Appendixsupporting

confidence: 73%

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

et al. 2014

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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-TbCd 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. 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 μ 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. Keywords Physics and Astronomy Disciplines Condensed Matter Physics Magnetic and transport properties of i-R-Cd icosahedral quasicrystals (R=Y, Gd-Tm)

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Section: Appendixsupporting

confidence: 73%

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

et al. 2014

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“…Besides the negative slope of zero-field resistance at room temperature, the resistance of i-R-Cd also exhibits a broad dome at lower temperature, for example, ∼100 K for i-Tb-Cd and ∼40 K for i-Gd-Cd. Although this feature might be affected by metallic Cd, similar domeshape resistances had been observed in many other quasicrystals as well and was explained by weak localization with strong spin-orbit coupling[76; 90; 91; 92; 154] and competing inelastic scattering in the presence of weak localization [155]. It worth pointing out that the existence of such a broad maxima was shown to be closely related to the sample preparation method and the sample quality [67; 156].…”

Section: Resistivity Of I-r-cdsupporting

confidence: 70%

Study of rare earth local moment magnetism and strongly correlated phenomena in various crystal structures

Kong¹

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I consider myself extremely lucky to have so many great people around me in the past several years. Foremost, I would like to thank my academic parents: my major advisor Dr. Paul C. Canfield and my unofficial co-advisor Dr. Sergey L. Bud'ko. What I've learned from you expands from physics to life, which I will always cherish and feel grateful for. Dr. Canfield is incredibly patient, considerate and willing to help. His enthusiasm in research has motivated mine. Dr. Bud'ko has been very supportive in all my experiments. Talking with him often brings me new ideas and new ways of thinking. I would also like to thank Andreas Kreyßig and Valentin Taufour for their numerous, detailed teaching and discussions. Danke and merci.

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Dominance of magnetic scattering in the electrical-transport of Al70.5Pd22Mn7.5 icosahedral quasicrystal

Cited by 2 publications

References 43 publications

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

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

Study of rare earth local moment magnetism and strongly correlated phenomena in various crystal structures

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