ISSN:
1572-9605
Keywords:
pair breaking
;
magnetic susceptibility
;
carbide superconductors
Source:
Springer Online Journal Archives 1860-2000
Topics:
Electrical Engineering, Measurement and Control Technology
,
Physics
Notes:
Abstract We investigated the magnetic properties of pure and lanthanoid (RE = Gd, Dy, or Er) doped samples of Y2C2Br2 (T c = 5.04 K) by means of SQUID magnetization measurements. The analysis of the high-field susceptibility of the undoped material allows the determination of the Pauli susceptibility, the electronic density of states, and the Stoner enhancement. T c decreases with increasing spin momenta S and doping concentrations x (0 ≤ x ≤ 1.2 at.%/Y) of the paramagnetic lanthanoid dopants. We estimate the exchange integral |I ex| of the lanthanoid spin and the conduction electron spin as well as the critical concentrations x c , relying on the Ginzburg–Landau–Abrikosov–Gor'kov (GLAG) theory of impurity pair breaking for dilute alloys (x → 0).
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1023/A:1007771529474
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