Electrical and magnetic properties of La0.7Ca0.3MnO3 films prepared by RF magnetron sputtering method for colossal magnetoresistance applications

다국어 초록 (Multilingual Abstract)

La_(0.7)Ca_(0.3)MnO_(3) powders were prepared by solution combustion method. The electrical and magnetic properties of their thin films were investigated for colossal magnetoresistance applications. Sputter targets were prepared using the powders to deposit La_(0.7)Ca_(0.3)MnO_(3) thin films on SiO_(2) buffer layered Si substrate by RF magnetron sputtering. The particles were nano-sized and their specific surface area was 49.44 m²/g. This fact resulted in the decrease of sintering temperature by 300 ℃. It was easy to get high purity La_(0.7)Ca_(0.3)MnO_(3) powders with perovskite structure. The maximum magnetoresistance ratio of 1210% was observed at 96 K. In this study, the La_(0.7)Ca_(0.3)MnO_(3) films showed the colossal magnetoresistance properties even though the films were deposited on the amorphous SiO_(2) substrate and non-epitaxially. This is probably due to the high quality single phase of the thin film.

목차 (Table of Contents)

• 1. Introduction
• 2. Experimental details
• 2.1. Powder preparation and measurement
• 2.2. Thin film preparation and characterization
• 3. Results and discussion
• References