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

Journal Article · Sat May 01 04:00:00 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), Journal Name: Phys. Rev. B: Condens. Matter; (United States) Vol. 25:9; ISSN PRBMD
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360204* -- Ceramics
Cermets
&amp; Refractories-- Physical Properties
656102 -- Solid State Physics-- Superconductivity-- Acoustic
Electronic
Magnetic
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&amp; Thermal Phenomena-- (-1987)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ANTIFERROMAGNETISM
BORIDES
BORON COMPOUNDS
CURIE-WEISS LAW
DATA
DIAGRAMS
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
EXPERIMENTAL DATA
HOLMIUM BORIDES
HOLMIUM COMPOUNDS
INFORMATION
IRIDIUM BORIDES
MAGNETIC FIELDS
MAGNETIC PROPERTIES
MAGNETISM
MAGNETIZATION
NUMERICAL DATA
PHASE DIAGRAMS
PHYSICAL PROPERTIES
POWDERS
RARE EARTH COMPOUNDS
RHODIUM BORIDES
RHODIUM COMPOUNDS
SUPERCONDUCTIVITY
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENT COMPOUNDS
TRANSITION TEMPERATURE
ULTRALOW TEMPERATURE