Abstract
Transport and calorimetric properties of Mn1−xCrxSi (x=0.025) down to 2K and magnetic fields up to 13T are reported. Electrical resistivity in zero field as well as in magnetic fields, below a magnetic transition temperature, Tc=23.6K could be described using a T2 term with large coefficient, invoking the role of spin fluctuations. Sommerfeld coefficient ‘γ’ of specific heat is an enhanced one as compared to the pure MnSi. Negative magnetoresistance (35% at 13T) with maximum at Tc and a decrease in coefficient of T2 term in resistivity suggests the suppression of spin fluctuations in high magnetic fields. This is further supported by negative magneto-specific heat in the vicinity of Tc coupled with a decrement in the Sommerfeld coefficient ‘γ’ of specific heat under a field of 10T. Kadowaki-Woods ratio places the system close to other systems showing strong spin fluctuations.
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