No abstract

The dependence of the magnetization for the ternary compounds UAsS, UAsSe, and UAsTe on temperature and magnetic field has been investigated in the temperature range between 3 K and the respective Curie point in fields up to 80 kOe. Measurements were performed for both polycrystalline and single crystal samples. In the latter case the magnetization along the c‐axis, being the easy one, was measured only. All these compounds exhibit large anisotropy of the order 107 erg/cm3. The average values of the magnetic moments of the uranium ion (1.1 to 1.4 BM) along the c‐axis are smaller than those reported for other uranium compounds having similar crystal structure. Both UAsS and UAsSe have rectangular hysteresis loops in helium temperature region, with BH product of the order 107 erg. They also display unusual temperature variation of the magnetization, resulting probably from the temperature dependence of the magnetocrystalline anisotropy.

No abstract

An investigation is made of the temperature dependence of the electrical resistivity of cubic ferromagnetic U,P4 and U,As, single crystals along [loo], [110], and [lll] in the temperature range 2 tjo 320 "K. The magnetoresistivity has been examined from 80 O K to the Curie temperature in magnetic fields up to 5.3 kOe. It is found that the compounds show anisotropic behaviour, a convex e vs. T dependence which is unusual for a simple collinear ferromagnet, and a large magnetoresistivity (ARIR = 10 to 30%). The measurements of the thermal expansion of polycrystalline samples show that in U,P, strong exchange striction occurs. k3CCJleAOBaHbI TeMIIepaTypHbIe 3aBHCIIMOCTII 3JIeKTpPlYeClrOrO COIIPOTIIB3eHEiH MOHOKPHCTaJIJIHYeCKMX 06pa340B @eppOMarHIITHblX CoeAMHeHHfi 12 U&S4 B HIIe 3THX 06pa340B OT 80 "H HO T , S MarHHTHbIX IIOJIFIX C HaIIpXWeHHOCTbK) 30 5 $3 IE3. 06HapymeHbI aHEi30TpOIIHbIe CBO&CTBa, aHOMaJILHaR BbIIIYKJIOCTb @YHHQMLT e(T) IIO CpaBHeHHII C KOJIIIHeapHbIMH @eppOMarHeTPlKaMM II CBfI3aHHOe C 3TIIM 603blUOe 3HaYeHHe Ma~HHTOCOIlpOTHBJIeHHH A R / R = 10 A0 3076. M3MepeHHH Tep-IJJYIO 06MeHHYK) CTPHKI[HH) EJIR u,P4 B 06JIaCTPi Mal' HHTHO1' 0 ynOpXAOseHHH. iianpasneHmx [loo], [110], [lll] B ~a a n a a o~e 2 ao 320 "H II MaramoconpoTmsne-iwviecHoir pacmnpReMocTa nonmpmcTannmecmix o6pa3uo~ y~a m~a r o~ Ha 6036-