Abstract
DC electrical current-dependent resistance and pulsed current–voltage characteristics as a function of temperature of mixed valent Mn oxide-based La 5 / 8 - y Pr y Ca 0.375 MnO 3 ( y = 0.35 ) single crystals are reported. We find that the low-temperature regime of this material is strongly current dependent. For small current densities ( ∼ 10 μ A / cm 2 ) , the metal–insulator transition related to the low-temperature enlargement of the ferromagnetic fraction is not observed down to 10 K. Higher current densities causes a large decrease of the resistance, which is temperature dependent and exhibits memory effects. Our results are interpreted within a scenario of strong competition between charge and ferromagnetic ordering.
Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
