Structural Stability of the Square Flux Line Lattice in YNI{sub 2}B{sub 2}C and LuNi{sub 2}B{sub 2}C Studied with Small Angle Neutron Scattering

Journal Article · Tue Jul 01 00:00:00 EDT 1997 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.79.487· OSTI ID:527038

Eskildsen, M R; Andersen, N H; Mortensen, K ^[1]; Gammel, P L; Barber, B P; Ramirez, A P; Bishop, D J ^[2]; Bolle, C A; Lieber, C M ^[3]; Canfield, P C ^[4]

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1. Riso/ National Laboratory, DK-4000 Roskilde (Denmark)
2. Bell Laboratories, Lucent Technologies, Murray Hill, New Jersey 07974 (United States)
3. Harvard University, Cambridge, Massachusetts 02138 (United States)
4. Iowa State University, Ames, Iowa 50011 (United States)

We have studied the flux line lattice in YNi{sub 2}B {sub 2}C and LuNi{sub 2}B {sub 2}C , the nonmagnetic end members of the borocarbide superconductors using small angle neutron scattering and transport. For fields, {bold H}{parallel}{bold c} , we find a square symmetric lattice which disorders rapidly above H/H{sub c2}{approximately}0.2 , well below the {open_quotes}peak effect{close_quotes} at H/H{sub c2}=0.9 . The results for H/H{sub c2}{lt}0.2 can be understood within the collective pinning model, and are controlled by the tilt modulus c{sub 44} . For H/H{sub c2}{gt}0.2 , the disordering appears to be associated with the field dependence of the shear modulus, c{sub 66} . {copyright} {ital 1997} {ital The American Physical Society}

• Research Organization: Ames National Laboratory
• DOE Contract Number: W-7405-ENG-82
• OSTI ID: 527038
• Journal Information: Physical Review Letters, Vol. 79, Issue 3; Other Information: PBD: Jul 1997
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
66 PHYSICS
YTTRIUM CARBIDES
SUPERCONDUCTIVITY
NICKEL CARBIDES
BORIDES
FLUX QUANTIZATION
NEUTRON DIFFRACTION
LUTETIUM COMPOUNDS
SMALL ANGLE SCATTERING