Magnetostriction and thermal expansion of the Kondo semiconductor Ce{sub 3}Bi{sub 4}Pt{sub 3}

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We report dilatometric thermal expansion ({alpha}) and magnetostriction ({lambda}) measurements on the Kondo semiconductor Ce{sub 3}Bi{sub 4}Pt{sub 3} and its non-magnetic analog La{sub 3}Bi{sub 4}Pt{sub 3} in fields to 100 kOe. The magnetic contribution to the thermal expansion of Ce{sub 3}Bi{sub 4}Pt{sub 3} displays a broad maximum centered at 50 K, close to the temperature where the 4f specific heat is a maximum. The linear magnetostriction is anomalously large in Ce{sub 3}Bi{sub 4}Pt{sub 3}, with values that are characteristic of mixed-valent compounds ({lambda}{sub {perpendicular}} = 3.26x10{sup {minus}5}, {lambda}{sub {parallel}} = -6.24x10{sup {minus}5} in 100 kOe at 4 K). The volume ... continued below

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7 p.

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Hundley, M.F.; Neumeier, J.J.; Thompson, J.D.; Lacerda, A. & Canfield, P.C. May 1, 1995.

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We report dilatometric thermal expansion ({alpha}) and magnetostriction ({lambda}) measurements on the Kondo semiconductor Ce{sub 3}Bi{sub 4}Pt{sub 3} and its non-magnetic analog La{sub 3}Bi{sub 4}Pt{sub 3} in fields to 100 kOe. The magnetic contribution to the thermal expansion of Ce{sub 3}Bi{sub 4}Pt{sub 3} displays a broad maximum centered at 50 K, close to the temperature where the 4f specific heat is a maximum. The linear magnetostriction is anomalously large in Ce{sub 3}Bi{sub 4}Pt{sub 3}, with values that are characteristic of mixed-valent compounds ({lambda}{sub {perpendicular}} = 3.26x10{sup {minus}5}, {lambda}{sub {parallel}} = -6.24x10{sup {minus}5} in 100 kOe at 4 K). The volume magnetostriction is positive and a factor of ten smaller than the linear coefficients ({lambda}{sub V} = 2.75x10{sup {minus}6} in 100 kOe at 4 K). The volume magnetostriction is temperature-dependent, and peaks at 50 K. The data are considered in terms of a Grueneisen analysis that links the temperature-dependent magnetic susceptibility, thermal expansion, magnetostriction, bulk modulus, and specific heat of Ce{sub 3}Bi{sub 4}Pt{sub 3} via temperature-dependent electronic and magnetic scaling parameters.

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7 p.

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OSTI as DE95011975

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  • 2. physical phenomena at high magnetic fields conference, Tallahassee, FL (United States), 6-9 May 1995

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  • Other: DE95011975
  • Report No.: LA-UR--95-1555
  • Report No.: CONF-9505186--1
  • Grant Number: W-7405-ENG-36
  • Office of Scientific & Technical Information Report Number: 67763
  • Archival Resource Key: ark:/67531/metadc703872

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  • May 1, 1995

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  • Sept. 12, 2015, 6:31 a.m.

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  • Aug. 23, 2016, 3:09 p.m.

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Hundley, M.F.; Neumeier, J.J.; Thompson, J.D.; Lacerda, A. & Canfield, P.C. Magnetostriction and thermal expansion of the Kondo semiconductor Ce{sub 3}Bi{sub 4}Pt{sub 3}, article, May 1, 1995; New Mexico. (digital.library.unt.edu/ark:/67531/metadc703872/: accessed November 13, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.