The breakdown of de Gennes Scaling in TbxEr1-xNi2B2C and its mean field theory explanation

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The Neel temperatures, T{sub N}, of Tb{sub x}Er{sub 1-x}Ni{sub 2}B{sub 2}C samples have been determined from the temperature dependence of magnetization measurements. A breakdown of the de Gennes scaling of T{sub N} with a clear turning point around x = 0.45 has been observed. The T{sub N} values of Tb{sub x}Er{sub 1-x}Ni{sub 2}B{sub 2}C do not change much within the range of O < x < 0.45 and then, for larger x they increase almost linearly with concentration until T{sub N} = 14.9K is reached for x = 1, TbNi{sub 2}B{sub 2}C. The clear change in the x-dependence of T{sub ... continued below

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409 Kb

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Gao, Chunwang May 1, 2005.

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  • Ames Laboratory
    Publisher Info: AMES (Ames Laboratory (AMES), Ames, IA)
    Place of Publication: Ames, Iowa

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The Neel temperatures, T{sub N}, of Tb{sub x}Er{sub 1-x}Ni{sub 2}B{sub 2}C samples have been determined from the temperature dependence of magnetization measurements. A breakdown of the de Gennes scaling of T{sub N} with a clear turning point around x = 0.45 has been observed. The T{sub N} values of Tb{sub x}Er{sub 1-x}Ni{sub 2}B{sub 2}C do not change much within the range of O < x < 0.45 and then, for larger x they increase almost linearly with concentration until T{sub N} = 14.9K is reached for x = 1, TbNi{sub 2}B{sub 2}C. The clear change in the x-dependence of T{sub N} around x = 0.45 can be linked to a change in the local moment ordering direction from transverse to longitudinal, a change which is consistent with recent resonant X-ray scattering data. These features in T{sub N}(x) can be explained using a mean field model.

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409 Kb

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  • Report No.: IS-T 2051
  • Grant Number: W-7405-ENG-82
  • Office of Scientific & Technical Information Report Number: 850042
  • Archival Resource Key: ark:/67531/metadc782922

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  • May 1, 2005

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  • Dec. 3, 2015, 9:30 a.m.

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  • Nov. 3, 2016, 11:36 a.m.

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Gao, Chunwang. The breakdown of de Gennes Scaling in TbxEr1-xNi2B2C and its mean field theory explanation, thesis or dissertation, May 1, 2005; Ames, Iowa. (digital.library.unt.edu/ark:/67531/metadc782922/: accessed August 19, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.