Title :
Effect of Ce substitution on antiferromagnetic transition in the heavy-electron compound URu2Si2
Author :
Mihalik, Matus ; Matas, S. ; Prokes, K. ; Nakotte, H. ; Kim-Ngan, N.H. ; Menovsky, A.A.
Author_Institution :
Inst. of Exp. Phys., Slovak Acad. of Sci., Kosice, Czechoslovakia
fDate :
3/1/1994 12:00:00 AM
Abstract :
The effect of Ce substitution for U in the heavy-electron system URu2Si2, has been investigated by means of susceptibility, resistivity and specific-heat measurements. Our measurements taken on single-crystalline samples indicate that a spin-density-wave transition at 17.5 K is rapidly suppressed with alloying. The Neel temperature initially falls but then recovers as 5% substitution is approached. The strong magnetocrystalline anisotropy changes from uniaxial type to multiaxial type for x=0.05. The anomalies in the susceptibility, resistivity and specific-heat below 30 K suggest the presents of another type of magnetic ordering which is quite different from that of URu2Si2
Keywords :
Neel temperature; antiferromagnetic properties of substances; cerium alloys; electrical conductivity of crystalline metals and alloys; heavy fermion superconductors; magnetic anisotropy; magnetic susceptibility; ruthenium alloys; silicon alloys; specific heat of solids; spin density waves; uranium alloys; 4.2 to 300 K; Ce substitution; DC magnetization; Neel temperature; SDW instability; UCeRu2Si2; URu2Si2; antiferromagnetic transition; heavy-electron compound; magnetic ordering; magnetocrystalline anisotropy; multiaxial anisotropy; resistivity; single-crystalline samples; specific-heat; spin-density-wave transition; susceptibility; uniaxial anisotropy; Anisotropic magnetoresistance; Antiferromagnetic materials; Conductivity; Electric variables measurement; Magnetic anisotropy; Magnetic field measurement; Magnetic susceptibility; Perpendicular magnetic anisotropy; Superconducting magnets; Temperature;
Journal_Title :
Magnetics, IEEE Transactions on