ISSN:
1573-7357
Source:
Springer Online Journal Archives 1860-2000
Topics:
Physics
Notes:
Abstract The Hall voltageU xy (H), magnetoresistance ρ(H), magnetization in the superconducting stateM(H), and the second superconducting critical magnetic field of UBe13 have been investigated. It is found thatU xy (H) is not linear, but has a maximum nearH=70 kOe atT=1.9 K. When the temperature rises from 1.9 to 100 K, the Hall coefficientR(H→0) decreases about 20 times from 2.5×10−10 to 1.35×10−11 Ω-cm/Oe. The rise of the magnetic field causes a strong decrease of the electrical resistance: atT=1.7 K, ρ(0)/ρ(210kOe)⋍5.8. From theH c2 investigation for single crystals it can be seen that near Tc the anisotropy ofH c2 is absent (it becomes visible only upon loweringT to 0.9T c ). TheM $$(H)_{T〈 T_c } $$ is similar to the typical dependence for type II superconductors. The thermodynamic critical fieldH c (0)≈1 kG, the Ginzburg-Landau parameter x ≈ 60, and the penetration depth λ≈4.10−5 cm. The effects of alloying a small quantity of iron and of neutron irradiation are investigated. The effects of alloying with other compounds of U and Be are also discussed. It is possible to suppose that UBe13 has two groups of carriers, “heavy” and “light,” with the anomalous properties of UBe13 caused by the specificity of the interaction between these two groups of carriers.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00681544
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