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Magnetoresistance studies on RPd(2)Si (R = Tb, Dy, Lu) compounds
R Rawat1, Pallavi Kushwaha, I Das
1UGC-DAE Consortium for Scientific Research, University Campus, Khandwa Road, Indore-452001, India.
Abstract:
Magnetoresistance studies on RPd(2)Si (R = Tb, Dy and Lu) compounds show large negative magnetoresistance (MR) in TbPd(2)Si and DyPd(2)Si near the magnetic ordering temperature. Positive MR at low temperature in the ferromagnetic Dy compound is shown to arise from the orbital contribution (the Lorentz force effect). As a consequence, a deviation from the linear relation between MR and isothermal entropy change (i.e. the magnetocaloric effect) is observed. In the case of the Tb compound, anomalous magnetoresistance behavior is observed at 3 K, where the resistivity is found to be different before and after magnetic field cycling. These results suggest complex magnetic behavior in TbPd(2)Si.
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