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Title: Magnetotransport in the heavy-fermion system YbNi{sub 2}B{sub 2}C

Abstract

We have measured the high field transverse magnetoresistance and magnetization on single crystalline samples of YbNi{sub 2}B{sub 2}C with the applied magnetic field both parallel and perpendicular to the {ital c} axis of the tetragonal crystal structure. At high temperatures, the magnetoresistance is negative with a magnitude that increases as the temperature is lowered. A scaling analysis of the data for {bold H}{perpendicular}{bold c} finds a characteristic energy that is {approximately}20 K at low temperatures, which is a factor of 2 larger than the Kondo temperature determined from thermodynamic measurements, and it increases linearly with the temperature. Even though the magnetoresistance for {bold H}{parallel}{bold c} is also negative, the data do not scale. At low temperatures, the magnetoresistance is very anisotropic. In the Fermi-liquid regime below {approximately}1.6 K, the resistivity has a temperature-independent contribution due to ligand and/or Kondo-hole disorder and a term from electron-electron scattering that goes like T{sup 2}. For {bold H}{perpendicular}{bold c}, the residual resistivity and the T{sup 2} coefficient are field dependent. Both the high- and low-temperature data are compared to various theoretical calculations. {copyright} {ital 1999} {ital The American Physical Society}

Authors:
 [1];  [2];  [3];  [2];  [4]
  1. Department of Physics, University of California, Riverside, California 92521 (United States)|[National High Magnetic Field Laboratory, Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States)
  2. National High Magnetic Field Laboratory, Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States)
  3. Iowa State University and Ames Laboratory, Ames, Iowa 50011 (United States)
  4. Department of Physics, University of California, Riverside, California 92521 (United States)
Publication Date:
OSTI Identifier:
686462
Resource Type:
Journal Article
Journal Name:
Physical Review, B: Condensed Matter
Additional Journal Information:
Journal Volume: 60; Journal Issue: 11; Other Information: PBD: Sep 1999
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; YTTERBIUM COMPOUNDS; NICKEL COMPOUNDS; CRYSTAL STRUCTURE; YTTERBIUM CARBIDES; NICKEL CARBIDES; BORIDES; MAGNETORESISTANCE; BORON CARBIDES; TEMPERATURE DEPENDENCE; SCALING; ANISOTROPY; KONDO EFFECT

Citation Formats

Yatskar, A., Mielke, C.H., Canfield, P.C., Lacerda, A.H., and Beyermann, W.P. Magnetotransport in the heavy-fermion system YbNi{sub 2}B{sub 2}C. United States: N. p., 1999. Web. doi:10.1103/PhysRevB.60.8012.
Yatskar, A., Mielke, C.H., Canfield, P.C., Lacerda, A.H., & Beyermann, W.P. Magnetotransport in the heavy-fermion system YbNi{sub 2}B{sub 2}C. United States. doi:10.1103/PhysRevB.60.8012.
Yatskar, A., Mielke, C.H., Canfield, P.C., Lacerda, A.H., and Beyermann, W.P. Wed . "Magnetotransport in the heavy-fermion system YbNi{sub 2}B{sub 2}C". United States. doi:10.1103/PhysRevB.60.8012.
@article{osti_686462,
title = {Magnetotransport in the heavy-fermion system YbNi{sub 2}B{sub 2}C},
author = {Yatskar, A. and Mielke, C.H. and Canfield, P.C. and Lacerda, A.H. and Beyermann, W.P.},
abstractNote = {We have measured the high field transverse magnetoresistance and magnetization on single crystalline samples of YbNi{sub 2}B{sub 2}C with the applied magnetic field both parallel and perpendicular to the {ital c} axis of the tetragonal crystal structure. At high temperatures, the magnetoresistance is negative with a magnitude that increases as the temperature is lowered. A scaling analysis of the data for {bold H}{perpendicular}{bold c} finds a characteristic energy that is {approximately}20 K at low temperatures, which is a factor of 2 larger than the Kondo temperature determined from thermodynamic measurements, and it increases linearly with the temperature. Even though the magnetoresistance for {bold H}{parallel}{bold c} is also negative, the data do not scale. At low temperatures, the magnetoresistance is very anisotropic. In the Fermi-liquid regime below {approximately}1.6 K, the resistivity has a temperature-independent contribution due to ligand and/or Kondo-hole disorder and a term from electron-electron scattering that goes like T{sup 2}. For {bold H}{perpendicular}{bold c}, the residual resistivity and the T{sup 2} coefficient are field dependent. Both the high- and low-temperature data are compared to various theoretical calculations. {copyright} {ital 1999} {ital The American Physical Society}},
doi = {10.1103/PhysRevB.60.8012},
journal = {Physical Review, B: Condensed Matter},
number = 11,
volume = 60,
place = {United States},
year = {1999},
month = {9}
}