Effects of superconductivity on rare-earth-ion dynamics in (Ho/sub x/Lu/sub 1-x/)Rh/sub 4/B/sub 4/

Conference · Sat Jan 01 00:00:00 EST 1983

OSTI ID:5668675

Heffner, R H; Cooke, D W; Hutson, R L; Leon, M; Schillaci, M E; Smith, J L; Yaouance, A; Dodds, S A; Gupta, L C; MacLaughlin, D E

The temperature dependence of the Ho-ion fluctuation rate tau/sub m//sup -1/ in the pseudoternary compound Ho/sub x/Lu/sub 1-x/Rh/sub 4/B/sub 4/ is obtained using the zero-field muon spin relaxation technique, primarily for x = 0.02. A sharp reduction in the magnitude and a change in the temperature dependence of tau/sub m//sup -1/ occur at the superconducting transition temperature T/sub s/. Above T/sub s/ the temperature dependence of tau/sub m//sup -1/ can be attributed to an activated relaxation process, whereby fluctuations occur by excitation to the first few crystal-field-split states. Neither the temperature dependence nor the sharp change in tau/sub m//sup -1/ at T less than or equal to T/sub s/ are presently understood. The data are contrasted with the recent NMR data of Kumagai and Fradin for dilute Gd- and Er-based rhodium borides, which have very different crystal-field-induced level schemes from Ho/sub x/Lu/sub 1-x/Rh/sub 4/B/sub 4/.

• Research Organization: Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
• DOE Contract Number: W-7405-ENG-36
• OSTI ID: 5668675
• Report Number(s): LA-UR-83-2775; CONF-831187-4; ON: DE84001319
• Resource Relation: Conference: MMM conference, Pittsburg, PA, USA, 8 Nov 1983
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
HOLMIUM BORIDES
SUPERCONDUCTIVITY
LUTETIUM BORIDES
RHODIUM BORIDES
HOLMIUM IONS
MUONS
RELAXATION
SPIN
TEMPERATURE DEPENDENCE
ANGULAR MOMENTUM
BORIDES
BORON COMPOUNDS
CHARGED PARTICLES
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ELEMENTARY PARTICLES
FERMIONS
HOLMIUM COMPOUNDS
IONS
LEPTONS
LUTETIUM COMPOUNDS
PARTICLE PROPERTIES
PHYSICAL PROPERTIES
RARE EARTH COMPOUNDS
RHODIUM COMPOUNDS
TRANSITION ELEMENT COMPOUNDS
360204* - Ceramics
Cermets
& Refractories- Physical Properties
656102 - Solid State Physics- Superconductivity- Acoustic
Electronic
Magnetic
Optical
& Thermal Phenomena- (-1987)