Mn1-xFexCoGe: A strongly correlated metal in the proximity of a noncollinear ferromagnetic state | Zendy

Tapas Samanta | Zendy; Igor Dubenko | Zendy; Abdiel Quetz | Zendy; Joseph Prestigiacomo | Zendy; P. W. Adams | Zendy; Shane Stadler | Zendy; Naushad Ali | Zendy

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Mn1-xFexCoGe: A strongly correlated metal in the proximity of a noncollinear ferromagnetic state

Author(s) -

Tapas Samanta,

Igor Dubenko,

Abdiel Quetz,

Joseph Prestigiacomo,

P. W. Adams,

Shane Stadler,

Naushad Ali

Publication year - 2013

Publication title -

applied physics letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.182

H-Index - 442

eISSN - 1077-3118

pISSN - 0003-6951

DOI - 10.1063/1.4816381

Subject(s) - condensed matter physics , ferromagnetism , quasiparticle , fermi level , electron , intermetallic , anisotropy , density of states , metal , mean free path , physics , proximity effect (electron beam lithography) , materials science , superconductivity , alloy , electron beam lithography , quantum mechanics , layer (electronics) , resist , metallurgy , composite material

An unusually large Kadowaki–Woods ratio of A/γ2 ∼ 43 μΩ·cm·mol2·K2·J−2 has been observed for intermetallic Mn1-xFexCoGe compounds in the proximity of x = 0.2 where the magnetic state of itinerant electrons system changes. The ratio is approximately four times larger than observed for heavy fermion systems. The manifestation of the strong electron correlations can be realized from the anisotropic origin of the effect through the substantial reduction of interlayer transport of heavy quasiparticles with comparable mean-free path and interlayer spacing in the proximity of a noncollinear ferromagnetic state associated with a large density of states at the Fermi level.

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