Transverse-field muon spin relaxation investigations of the magnetic penetration depth in the carbide superconductors Y2C2(Br,I)2 and YC2

R. W. Henn; C. Bernhard; R. K. Kremer; Th. Gulden; A. Simon; Th. Blasius; Ch. Niedermayer

doi:10.1103/PhysRevB.62.14469

← Back to search

Transverse-field muon spin relaxation investigations of the magnetic penetration depth in the carbide superconductors Y2C2(Br,I)2 and YC2

R. W. Henn, C. Bernhard, R. K. Kremer, Th. Gulden, A. Simon, Th. Blasius, Ch. Niedermayer

DOI 10.1103/PhysRevB.62.14469 · Physical Review B

T1

Active bibliographic source — not scientific approval

Bibliographic access preserves source history; it does not approve extracted materials or validate reported claims. Review warnings on each occurrence separately.

Abstract

We present measurements of the temperature and magnetic field (Bext<0.2 T) dependences of the transverse-field muon spin relaxation rate taken on polycrystalline samples of the layered superconductors Y2C2X2, X=Br,I, and the binary carbide YC2. The aim of these investigations was to determine the magnetic penetration depth λ(T) which is a fundamental parameter of the superconducting state. The magnetic-field dependence of the muon-depolarization rate below Tc is discussed. An analysis of the temperature dependence of the depolarization rates allows qualitative conclusions regarding the strength of the electron-phonon coupling in the compounds under investigation. The dependence of the transition temperature on the condensate density of the halide-carbide superconductors is compared to that of other exotic superconductors.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
Y2C2Br2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	5.04	Pressure not reported	unknown
Y2C2I2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	9.97	Pressure not reported	unknown
YC2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	4.05	Pressure not reported	unknown
Y2C2Br0.5I1.5 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	11.6	Pressure not reported	unknown
YC2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	3.85	Pressure not reported	unknown
Y2C2I2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown
Y2C2Br2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown