Magneto- and Electrotransport Properties of Nd0.67Sr0.33Mn1-xFexO3 (x = 0.00, 0.05)
Ling, Chang Yoke · Ong, C. K.
Original · EN
Simultaneous studies on the magnetic and electrotransport properties of Nd₀.₆₇ Sr₀.₃₃ Mn₁₋ₓ Feₓ O₃ polycrystalline bulk and epitaxial thin films (x = 0.00 and 0.05) have been carried out. A magnetoresistance (MR) as high as 33% is observed for Nd₀.₆₇ Sr₀.₃₃ MnO₃ bulk at the metal-insulator transition (MIT) temperature (Tₚ) of 273 K in a magnetic field (H) of 10 kOe. Fe substitution at Mn sites reduces the ferromagnetic (FM) ordering temperature (Tc) and leads to an overall increase in MR. MR as high as 90% is observed for thin film (x = 0.05) at H = 10 kOe with Tₚ = 100 K while the corresponding bulk has a MR of only 43%. Low field MR in epitaxial thin films also display a pronounced anisotropy effect compared to bulk materials.
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