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  • 1
    Electronic Resource
    Electronic Resource
    Ferromagnetism in the RERh4B4 compounds (1980)
    Springer
    Journal of low temperature physics 41 (1980), S. 639-651 
    Details
    ISSN: 1573-7357
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: The magnetic ordering temperatures of the primitive tetragonal rare earth (RE) rhodium boride compounds exhibit a peak at DyRh4B4, rather than GdRh4B4 as predicted from ordering via the indirect RKKY exchange interaction. This deviation is analyzed in terms of the depression of the superconducting transition temperature of LuRh4B4 by dilute amounts of RE impurity ions and the magnetic heat capacities of the RERh4B4 compounds for RE = Gd, Tb, Dy, and Ho. The strength of anisotropic crystalline electric field forces, as inferred from magnetic entropy considerations, may be the origin of the anomalous magnetic ordering temperatures. In addition, the depression of the superconducting transition temperatures of ErRh4B4 and TmRh4B4 from that of LuRh4B4 is shown to arise primarily from elastic exchange scattering of the conduction electrons by the magnetic RE ions.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00114370
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  • 2
    Electronic Resource
    Electronic Resource
    Superconducting and normal state properties of ErRh4B4 and LuRh4B4 (1979)
    Springer
    Journal of low temperature physics 35 (1979), S. 651-669 
    Details
    ISSN: 1573-7357
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Detailed heat capacity measurements of the ternary compounds ErRh4B4 and LuRh4B4 have been performed between 0.5 and 36 K and in magnetic fields up to 4 kG, yielding new information on crystal field effects in these materials and on the influence of externally applied magnetic fields on the coupled superconducting-ferromagnetic reentrant transition in ErRh4B4. Static magnetic susceptibility data on LuRh4B4 are presented which allow qualitative conclusions to be drawn regarding the magnitude of exchange enhancement and orbital paramagnetic effects in the RERh4B4 compounds. The electrical resistivity of ErRh4B4 has also been determined between 4 K and room temperature.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00117903
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  • 3
    Electronic Resource
    Electronic Resource
    Observation of the coexistence of superconductivity and long-range magnetic order in TmRh4B4 (1981)
    Springer
    Journal of low temperature physics 44 (1981), S. 553-568 
    Details
    ISSN: 1573-7357
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: The ac electrical resistance, heat capacity, static magnetic susceptibility, thermal conductivity, and linear thermal expansion coefficient have been measured for the superconducting ternary compound TmRh4B4. The results indicate that the Tm3+ magnetic moments order at about 0.4 K, while bulk superconductivity, which occurs at 9.8 K, persists to temperatures below 60 mK, which was the low-temperature limit of the apparatus. Various possibilities for the type of magnetic order are examined.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00117843
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