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  • 1
    Electronic Resource
    Electronic Resource
    Superconductivity associated with ferromagnetic domain walls in HoMo6S8 and (Er1−xSnx)Er4Rh6Sn18 (1985)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 57 (1985), S. 3194-3196 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The compounds HoMo6S8 and (Er1−xSnx)Er4Rh6Sn18 (respectively, Ho-Mo-S and Er-Rh-Sn in the following) are known to be reentrant superconductors, the superconductivity being destroyed by the onset of long-range ferromagnetic order at low temperature. For the first time, the percolation of domain "walls'' superconductivity has been produced below 0.2 K in Ho-Mo-S single crystals, confirming a systematic study of sintered samples and theoretical expectations. In addition, the ac susceptibility of Er-Rh-Sn single crystals, measured below 0.5 K, is large and positive for large ac fields and nearly equal to −1/4π for low ac fields. This fact confirms the existence of superconducting domain "walls'' which screen the ac field.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.335147
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  • 2
    Electronic Resource
    Electronic Resource
    Itinerant ferromagnetism and superconductivity in bct ErRh4B4 (1985)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 57 (1985), S. 3113-3114 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The body centered tetragonal ErRh4B4 compound undergoes an itinerant ferromagnetic transition at Tm=21 K characterized by a susceptibility equal to the inverse of the demagnetizing coefficient. The itinerant ferromagnetism does not prevent the simultaneous presence of the superconductivity from 7.7 K down to 0 K. The diamagnetic ac susceptibility can be calculated from the ferromagnetic one. The coexistence of itinerant ferromagnetism and superconductivity among d electrons would be one of the most convincing arguments in favor of "odd-parity'' superconductivity.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.335175
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Magnetic field-induced superconductivity in the ferromagnetic state of HoMo6S8 (1987)
    Springer
    Journal of low temperature physics 69 (1987), S. 419-450 
    Details
    ISSN: 1573-7357
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The Chevrel-phase HoMo6S8 is one of the few known ferromagnetic reentrant superconductors, having an upper superconductive critical temperatureT c1 =1.78 K, a Curie temperatureT m =0.75 K, and reentering into a normal ferromagnetic state belowT c2 =0.64 K. After a brief survey of the characteristic properties of HoMo6S8, we present new results obtained by simultaneous resistance and magnetization measurements on a single crystal of HoMo6S8, performed in the whole temperature range 35mK≤T≤4.2 K and for several orientations of the easy magnetization axis with respect to the applied magnetic field. Magnetic field-induced superconductive transitions are observed well belowT c2 in the ferromagnetic state. Those transitions can be understood as the first experimental observation of a purely electromagnetic effect earlier suggested by Ginzburg: if the internal field is antiparallel to the spontaneous magnetization, the magnetic induction may be reduced below its critical value and a superconductive transition may take place. It is possible if exchange interactions are negligible; our results concerning the anisotropy of the internal upper critical fieldH c2 are consistent with that requirement. We also discuss the possible origins for the low-resistance state in zero field: it might be due to domain wall superconductivity.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00683331
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    Paper (German National Licenses)
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