Room temperature giant baroresistance and magnetoresistance and its tunability in Pd doped FeRh

Abstract

We report room temperature giant baro-resistance ($\approx$128\%) in $F{e}_{49}(R{h}_{0.93}P{d}_{0.07}{)}_{51}$. With the application of external pressure and magnetic field the temperature range of giant baro-resistance ($\approx$600\% at 5K and 19.9 kbar and 8 Tesla) and magnetoresistance ($\approx$-85\% at 5K and 8 tesla) can be tuned from 5 K to well above room temperature. As the AFM state is stabilized at room temperature under external pressure, it shows giant room temperature magnetoresistance ($\approx$-55\%) with magnetic field. Due to coupled magnetic and latticel changes, the isothermal change in room temperature resistivity with pressure (in the absence of applied magnetic field) as well as magnetic field (under various constant pressure) can be scaled together to a single curve when plotted as a function of X = T + 12.8*H - 7.2*P.

References in corpus (5)

• Room-temperature antiferromagnetic memory resistor
• Barocaloric and Magnetocaloric Effects in Fe49Rh51
• Instability of the rhodium magnetic moment as origin of the metamagnetic phase transition in alpha-FeRh
• Low temperature study of field induced antiferro-ferromagnetic transition in Pd doped FeRh
• First order antiferro-ferromagnetic transition in Fe49(Rh0.93Pd0.07)51 under simultaneous application of magnetic field and external pressure