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Pressure dependent magnetic, AC susceptibility and electrical properties of Nd7Pd3
Pramod Kumar,Puneet Jain,Rachana Kumar
RSC Advances Pub Date : 06/19/2015 00:00:00 , DOI:10.1039/C5RA07625K
Abstract

The effects of pressure on the magnetization and isothermal entropy change, AC susceptibility, and resistivity for Nd7Pd3 have been studied. Nd7Pd3 shows three magnetic transitions Tt (=15 K), TC (=34 K), and TN (=38 K) at a pressure of zero bar. TC and TN are very sensitive to the pressure and rates of change of TC and TN with respect to pressure, i.e., dTC/dp and dTN/dp are −1.906 K kbar−1 and −0.313 K kbar−1 respectively, whereas Tt is insensitive to pressure change. It has also been observed that the isothermal entropy change is also sensitive to pressure. Below 15 K, an indication of spin glass nature in the AC susceptibility data is seen. The time dependent magnetization at low temperatures also supports the spin glass nature, but at high temperatures it indicates a complex nature. The electrical resistivity data has been fitted to the relation ρ = ρ0 + AT2 in the temperature range 12–30 K and ρ = ρ0 + BTCT3 in the temperature range 40–220 K. The MH isotherm confirms the AFM nature of Nd7Pd3, which is confirmed further by the Arrott’s plot.

Graphical abstract: Pressure dependent magnetic, AC susceptibility and electrical properties of Nd7Pd3
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