Magnetic order and superconductivity in Ho(Ir/sub x/Rh/sub 1-x/)/sub 4/B/sub 4/ compounds

Journal Article · Sat May 01 00:00:00 EDT 1982 · Phys. Rev. B: Condens. Matter; (United States)

DOI:https://doi.org/10.1103/PhysRevB.25.5692· OSTI ID:5148845

Acker, F; Ku, H C

Magnetization data for Ho(Ir/sub x/Rh/sub 1-x/)/sub 4/B/sub 4/ compounds in the temperature range 1.4 to 4.2 K and in fields up to 68 kOe are presented. Evidence of antiferromagnetic order below T/sub m/approx. =1.75 K, is found for x = 0.5. This modifies the phase diagram drawn previously and suggests that the boundary T/sub m/(x) might be continuous for 0< or =x< or =1. The order seems to be complex and to change from ferromagneticlike to antiferromagneticlike near x = 0.17, the only concentration at which chi is isotropic (an ''easy'' axis at x = 0 becomes ''hard'' for x>0.17). Antiferromagnetic interactions between ions appears to play a role at all concentrations. The higher is x, the larger is the difference between the ordering temperature T/sub m/ and the Curie-Weiss intercept theta. In Ho(Ir/sub 0.17/Rh/sub 0.83/)/sub 4/B/sub 4/, T/sub m/ still coincides, within +- 0.05 K, with the lower superconducting critical temperature, T/sub c/2, and the value of the upper critical field, H/sub c/2, drops, by cooling, in a narrow interval above T/sub c/2. For the antiferromagnetic Ho(Ir/sub 0.7/Rh/sub 0.3/)/sub 4/B/sub 4/ compound (T/sub m/ = 2.7 K) spin flop or distortion of the magnetic structure is detectable, at 1.4 K, for low values of the external field (H>2 kOe).

• Research Organization: Institut de Physique Experimentale, Universite de Lausanne, 1015 Lausanne, Switzerland
• OSTI ID: 5148845
• Journal Information: Phys. Rev. B: Condens. Matter; (United States), Vol. 25:9
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
HOLMIUM BORIDES
MAGNETIC PROPERTIES
SUPERCONDUCTIVITY
IRIDIUM BORIDES
RHODIUM BORIDES
ANTIFERROMAGNETISM
CURIE-WEISS LAW
EXPERIMENTAL DATA
MAGNETIC FIELDS
MAGNETIZATION
PHASE DIAGRAMS
POWDERS
TRANSITION TEMPERATURE
ULTRALOW TEMPERATURE
BORIDES
BORON COMPOUNDS
DATA
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ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
HOLMIUM COMPOUNDS
INFORMATION
MAGNETISM
NUMERICAL DATA
PHYSICAL PROPERTIES
RARE EARTH COMPOUNDS
RHODIUM COMPOUNDS
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENT COMPOUNDS
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