Abstract
Low temperature ground state properties of Mn0.75Fe0.25Si are investigated based on temperature and magnetic field dependent behavior of specific heat and resistivity. Paramagnon spin fluctuations assisted non-Fermi liquid is suppressed by magnetic fields and gradual evolution of Fermi liquid is demonstrated. The tendency of magnetic field-induced crossover from non-Fermi to Fermi liquid behavior is illustrated by suitable magneto-specific heat scaling which reveals unusual quantum critical phenomenon in a 3d transition metal derived paramagnetic compound. In the absence of magnetic fields, Kadowaki–Wood's Ratio (KWR) A/γ2 is about 8.5μΩcmmol2K2J−2 which is 85% close to the originally proposed KWR and reaches 100% under the moderate magnetic fields of 0.7T.
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