Unfolding magnetic, electrical and universal magneto-resistance scaling behavior of Ni2Mn1−xCoxIn

Abstract

We uncover the magnetic, electrical transport properties and universal magneto-resistance scaling nature of cubic Ni2Mn1−xCoxIn with nominal compositions of x = 0.05 and 0.1. Positive Weiss temperature, magnetic saturation in relatively low fields, non-hysteretic and non-coercive signatures confirm soft-ferromagnetic behavior of the alloys. Formation of random ferromagnetic clusters in the paramagnetic state for x = 0.1 is noticed through Griffith’s phase signatures in inverse susceptibility. Rhodes–Wohlfarth analysis confirms the itinerant magnetic nature. These alloys exhibit metallic character with Fermi liquid behavior at low temperatures. Relatively smaller negative magneto-resistance indicates the suppression of itinerant spin fluctuations and incoherent scattering of conduction electrons. Second order magnetic phase transition is inferred from a well-scaled normalized magneto-resistance independent of magnetic field strength. Our study stimulates interest to unravel the ground state physical and magnetic properties of substituted (non-magnetic/magnetic for Mn Ni and In) soft-ferromagnetic Ni2MnIn.

Keywords

• Universal scaling
• Itinerant magnetism
• Soft ferromagnets
• Magnetoresistance, Ni2MnIn