Magnetotransport of the low-carrier density one dimensional S=1/2 antiferromagnet Yb₄A5₃.

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The transport properties of the semimetallic quasi-onedimensional S= 1/2 antiferromagnet Yb,As, have been studied by performing low-temperature (T 2 0.02 K) and high magnetic field (B I 60 T) measurements of the electrical resistivity p(T,B). For T 2 2 K a 'heavy fermion' like behavior AAT = AT' with huge and nearly field-independent coefficient A 3 3UuRcmK' is observed, whereas at lower temperatures p(r) deviates from this behavior and slightly increases to the lowest T. In B 0 and T L 6 K the resistivity shows an anomalous magnetic-history dependence together with an unusual relaxation behavior. In tht isothermal resistivity ... continued below

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20 p.

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Aoki, Hideki; Cichorek, T.; Custers, J.; Jaime, M. (Marcello); Ochiai, Akira,; Steglich, F. et al. January 1, 2001.

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Description

The transport properties of the semimetallic quasi-onedimensional S= 1/2 antiferromagnet Yb,As, have been studied by performing low-temperature (T 2 0.02 K) and high magnetic field (B I 60 T) measurements of the electrical resistivity p(T,B). For T 2 2 K a 'heavy fermion' like behavior AAT = AT' with huge and nearly field-independent coefficient A 3 3UuRcmK' is observed, whereas at lower temperatures p(r) deviates from this behavior and slightly increases to the lowest T. In B 0 and T L 6 K the resistivity shows an anomalous magnetic-history dependence together with an unusual relaxation behavior. In tht isothermal resistivity Shubnikov-de Haas oscillations, arising fiom a low-density system of mobile As-+ holes, with a frequency of 25 T have been recorded. From the T- and B-dependence of the SdH oscillations an effective carrier mass of (0.275 f 0.O05)ni0 and a charge-camtr mean-free path of 2 15 A are determined. Furthermore in B 2 15 T the system is near the quantum limit and spin-splitting effects are observed.

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20 p.

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  • Submitted to: International Symposium on Advances in Superconductivity and Magnetism, September 25-28, Mangalone, India

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  • Report No.: LA-UR-01-6492
  • Grant Number: none
  • Office of Scientific & Technical Information Report Number: 975879
  • Archival Resource Key: ark:/67531/metadc926599

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  • January 1, 2001

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  • Nov. 13, 2016, 7:26 p.m.

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  • Dec. 12, 2016, 12:23 p.m.

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Aoki, Hideki; Cichorek, T.; Custers, J.; Jaime, M. (Marcello); Ochiai, Akira,; Steglich, F. et al. Magnetotransport of the low-carrier density one dimensional S=1/2 antiferromagnet Yb₄A5₃., article, January 1, 2001; United States. (digital.library.unt.edu/ark:/67531/metadc926599/: accessed September 23, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.