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Interwoven magnetic and flux line structures in single crystal (Tm,Er)Ni2B2C
Journal of Applied Physics
  • P. L. Gammel, Lucent Technologies
  • D. Lopez, Lucent Technologies
  • D. J. Bishop, Lucent Technologies
  • M. R. Eskildsen, Risø National Laboratories
  • N. H. Andersen, Risø National Laboratories
  • K. Mortensen, Risø National Laboratories
  • I. R. Fisher, Iowa State University
  • K. O. Cheon, Iowa State University
  • Paul C. Canfield, Iowa State University
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We review studies of the interactions between magnetic order and the flux line lattice (FLL) in the (RE)Ni2B2Cintermetallic borocarbides for (RE)=Tm and Er using small angle neutron scattering (SANS) and magneto-transport. For (RE)=Tm the magnetic order and the FLL assume a common symmetry, sharing a phase transition at ∼2 kOe, despite an order of magnitude difference in periodicity. For (RE)=Er, the penetration depth λ and the coherence length ξ, both of which are derived from the FLL form factor, are modified near TN=6 K by a theoretically predicted weakly divergent pairbreaking. Finally, below 2.3 K, (RE)=Er shows a coexistence of weak ferromagnetism and superconductivity. This state reveals a highly disordered FLL and a striking increase in the critical current, both arising from the strong ferromagnetic pairbreaking.


The following article is from Journal of Applied Physics 87 (2000): 5544, doi:10.1063/1.373399. Posted with permission.

Copyright 2000 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics.
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American Institute of Physics
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P. L. Gammel, D. Lopez, D. J. Bishop, M. R. Eskildsen, et al.. "Interwoven magnetic and flux line structures in single crystal (Tm,Er)Ni2B2C" Journal of Applied Physics Vol. 87 Iss. 9 (2000) p. 5544 - 5548
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