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- Title
Effect of B-site bismuth doping on magnetic and transport properties of La<sub>0.5</sub>Ca<sub>0.5</sub>Mn<sub>1−x</sub>Bi<sub>x</sub>O<sub>3</sub> thin films.
- Authors
Sharma, Himanshu; Kumar, Deepak; Tulapurkar, Ashwin; Tomy, C. V.
- Abstract
The magnetic properties of manganites are extremely sensitive to the doping-induced structural (e.g., crystal structure, site occupancy and chemical ordering) modulations. Here, we report the effect of B-site bismuth doping on the magnetic and transport properties in La0.5Ca0.5Mn1−xBixO3 (LCMBO) thin films (for x = 0, 0.02 and 0.05) for high-efficiency spintronics devices. For thin film of LCMBO (with x = 0.02), a significant increase in the magnetization and ferromagnetic ordering temperature (TC) is observed. Also, about 98% magnetoresistance (MR) and unusually large (~ 42%) anisotropic magnetoresistance (AMR) are observed at 50 K in the same LCMBO (for x = 0.02) thin film. This observed improvement in TC, MR and AMR in LCMBO (with x = 0.02) thin film may be attributed to the modulation of the trapped electrons through JT distortions due to the replacement of Mn3+ ions by larger Bi3+ ions. With a further increase in bismuth doping (for x = 0.05) at the B-site, a significant decrease in magnetization and TC has been observed.
- Subjects
MAGNETIC properties; MANGANITE; MAGNETIC properties of manganese compounds; BISMUTH; SPINTRONICS; MAGNETORESISTANCE; MAGNETIZATION
- Publication
Journal of Materials Science, 2019, Vol 54, Issue 1, p130
- ISSN
0022-2461
- Publication type
Article
- DOI
10.1007/s10853-018-2833-z