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The magnetic field-pressure-temperature (H-P-T) phase diagram for first orderantiferromagnetic (AFM) to ferromagnetic (FM) transition inFe49(Rh0.93Pd0.07)51 has been constructed using resistivity measurements undersimultaneous application of magnetic field (up to 8 Tesla) and pressure (up to20 kbar). Temperature dependence of resistivity ({\rho}-T) shows that withincreasing pressure, the width of the transition and the extent of hysteresisdecreases whereas with the application of magnetic field it increases.Consistent with existing literature the first order transition temperature (TN)increases with the application of external pressure (~ 7.3 K/ kbar) anddecreases with magnetic field (~ - 12.8 K/Tesla). Exploiting these opposingtrends, resistivity under simultaneous application of magnetic field andpressure is used to distinguish the relative effect of temperature, magneticfield and pressure on disorder broadened first order transition. For this a setof H and P values are chosen for which TN (H1, P1) = TN (H2, P2). Measurementsfor such combinations of H and P show that the temperature dependence ofresistivity is similar i.e. the broadening (in temperature) of transition aswell as extent of hysteresis remains independent of H and P. The transitionwidth decreases exponentially with increasing temperature. Isothermalmagnetoresistance measurement under various constant pressure show that eventhough the critical field required for AFM-FM transition depends on appliedpressure, the hysteresis as well as transition width (in magnetic field) bothremains independent of pressure, consistent with our conclusions drawn from{\rho}-T measurements.

First order antiferro-ferromagnetic transition in Fe49(Rh0.93Pd0.07)51 under simultaneous application of magnetic field and external pressure