“…For alloys containing only Fe, Co, and/or Ni, the majority spin channel experiences negligible disorder scattering, thereby providing a short circuit, while for Cr-and Mn-containing alloys both spin channels experience strong disorder scattering due to an electron filling effect [33]. Very recently, it was found experimentally that NiFeCoCr has a quasiparticle coherence length that is very close to the nearest-neighbor interatomic distance [40], i.e., approaching the Mott-Ioffe-Regel limit where the standard picture of ballistically propagating quasiparticles becomes invalid [41]. In fact, NiCoCr, NiFeCoCrMn, and NiFeCoCrPd all have residual resistivities which are higher than NiFeCoCr, and all exhibit non-Fermi liquid behavior [26] and should probably be classed as trivial non-Fermi liquids [42].…”