{mu}{sup +} SR studies of magnetic properties of boron carbide superconductors

Conference · Thu Jun 02 04:00:00 EDT 1994

OSTI ID:10163073

Le, L P; Heffner, R H ^[1]; Nieuwenhuys, G J ^[2]; Canfield, P C ^[3]; Amato, A; Feyerherm, R; Gygax, F N; Schenck, A ^[4]; MacLaughlin, D E ^[5]

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1. Los Alamos National Lab., NM (United States)
2. Rijksuniversiteit Leiden (Netherlands). Kamerlingh Onnes Lab.
3. Ames Lab., IA (United States)
4. Paul Scherrer Inst. (PSI), Villigen (Switzerland)
5. California Univ., Riverside, CA (United States)

Positive-muon spin rotation ({mu}{sup +}SR) has been carried out in the recently discovered rare-earth boron carbide superconductors RNi{sub 2}B{sub 2}C, R = Ho, Er and Tm. For R = Ho and Er zero-field {mu}{sup +}SR measurements showed a well-defined internal field below the Neel temperatures (TN {approx} 5.5 K) coexisting with the superconducting state down to 0.1 K. The observed temperature dependence of the order parameter in R = Ho is consistent with a 2-dimensional Ising model. For R = Tm a spontaneous internal field appears above 30 K, whose magnitude saturates below about 3 K at a value corresponding to a rare earth moment much smaller than for Ho and Er. Transverse-field {mu}{sup +}SR measurements in R = Tm showed a superconducting penetration depth A = 1,200 {Angstrom}. The temperature dependence of {lambda} is consistent with conventional s-wave pairing.

• Research Organization: Los Alamos National Lab., NM (United States)
• Sponsoring Organization: USDOE, Washington, DC (United States)
• DOE Contract Number: W-7405-ENG-36
• OSTI ID: 10163073
• Report Number(s): LA-UR--94-1965; CONF-940863--2; ON: DE94014440
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360204
360207
665411
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
BORON CARBIDES
ERBIUM BORIDES
ERBIUM CARBIDES
HOLMIUM BORIDES
HOLMIUM CARBIDES
MAGNETIC PROPERTIES
MAGNETISM
MUON SPIN RELAXATION
NICKEL BORIDES
NICKEL CARBIDES
PENETRATION DEPTH
SUPERCONDUCTIVITY
SUPERCONDUCTORS
THULIUM BORIDES
THULIUM CARBIDES