Correlation between effects of electric current and magnetic field on transport properties of electron-doped manganite La_0.7Ce_0.3MnO₃thin films

Abstract

We report the effect of electric current and magnetic field, separately and in conjugation, on the transport behaviour of patterned La0.7Ce0.3MnO3 thin films. In the absence of a magnetic field, a significant reduction in peak resistance (Rp) was found with increasing bias current. This effect is also present when a magnetic field is applied, though the magnitude of the electroresistance (ER = [R(I = 0.05 µA)−R(I = 50 µA)]/R(I = 50 µA)) decreases. The metal–insulator transition temperature (Tp) increases both with increasing current and with magnetic field. We observe an interesting correlation between electric current and magnetic field: the magnetoresistance (MR = [RH = 0−RH = 1 T]/RH = 0) decreases with increasing bias current, while ER decreases with increasing magnetic field. Both ER and MR show a maximum near Tp. The interesting correlation between these two effects suggests that both these effects arise from the same origin.

Electroresistance, magnetocapacitance and magnetotransport properties of La0.55Ca0.45MnO3/BaTiO3 composite

“…Wu et al [30] reported a large electroresistance in LCMO thin film with PbZr 0.2 Ti 0.8 O 3 -ferroelectric gate, in a field effect configuration, and they concluded that electroresistance (ER) and CMR effects are complimentary in nature. Similar effects were found in some other thin films [31,32]. The possibility to control the magnetoresistance of ferromagnetic La 0.775 Sr 0.225 MnO 3 (LSMO) thin films on Ba 0.996 Y 0.004 TiO 3 and BaTi 0.85 Sn 0.15 O 3 substrates by electric field was also demonstrated [33].…”

Synthesis, Magnetic Properties, Magnetic Entropy and Arrot Plot of Antiferromagnetic Frustrated Er2Ti2O7 Compound

“…where coefficients A and B are temperature-dependent parameters containing the information of magneto-elastic coupling of the free energy [43] and electron-electron interaction [44]. For the condition of equilibrium, i.e.…”

Experimental Techniques for the Characterization of Magnetic Thin Films

“…The ever-increasing demand of miniaturization in magnetic recording media, with advances in thin film synthesis techniques, has accelerated the investigation of thin films of different materials (Venimadhav et al, 2004;Venimadhav et al, 2005;Ghimpu et al, 2013;Chaudhary, 2015a, 2015b). The applications of thin films are countless as they are now involved in almost every aspect of the physical world (Bajaj et al, 2007a(Bajaj et al, , 2007bSingh et al, 2007;Kumar et al, 2008;Sofin et al, 2011;Raju et al, 2013;Rana et al, 2013;Kamerbeek et al, 2014;Low et al, 2014;Husain et al, 2017). From the household mirror to a computer memory or a solar cell, thin films are widely used for their multiple advantages in different ways.…”