Magnetic structure and superconductivity in (Ho{sub x}Y{sub 1{minus}x})Ni{sub 2}B{sub 2}C
- Institut fuer Festkoerper-und Werkstofforschung Dresden, 01171 Dresden (Germany)
The superconducting transition and the magnetic structure of polycrystalline (Ho{ital {sub x}}Y{ital {sub 1{minus}x}})Ni{sub 2}B{sub 2}C have been investigated for {ital x}{ge}0.75 by resistivity measurements and neutron diffraction, respectively. For HoNi{sub 2}B{sub 2}C, the well known antiferromagnetic structure with {ital c}- and {ital a}-axis components existing between 4.5 and 6 K has been confirmed. Whereas for all investigated samples the component having the {ital a}-axis modulated structure exists in a narrow temperature range only, the intensity connected to the spiral magnetic state along the {ital c}-axis increases for {ital x}=0.85 and {ital x}=0.75 monotonically as the temperature decreases to the lowest measuring temperature of 1.6 K. Our results strongly suggest that the incommensurate modulated structure along the {ital a}-axis is responsible for pair breaking in the investigated (Ho{ital {sub x}}Y{ital {sub 1{minus}x}})Ni{sub 2}B{sub 2}C samples. On the other hand, the magnetic spiral structure with {ital c}-axis wave vector was found to coexist with superconductivity. A linear suppression of the superconducting transition temperature with increasing Ho content was observed which is in agreement with the Abrikosov{endash}Gor{close_quote}kov theory. We found a linear scaling with the effective de Gennes factors (x DG) (Ho) for both the superconducting transition and the magnetic ordering temperatures. {copyright} {ital 1997 American Institute of Physics.}
- OSTI ID:
- 554259
- Report Number(s):
- CONF-961141-; ISSN 0021-8979; TRN: 98:000872
- Journal Information:
- Journal of Applied Physics, Vol. 81, Issue 8; Conference: 41. annual conference on magnetism and magnetic materials, Atlanta, GA (United States), 12-15 Nov 1996; Other Information: PBD: Apr 1997
- Country of Publication:
- United States
- Language:
- English
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