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- Title
Structural and Magneto-Transport Properties of Copper Doped Double Layered Manganites LaCaMnO.
- Authors
Mahamdioua, N.; Amira, A.; Altintas, S.; Saoudel, A.; Boudjadja, Y.; Amirouche, L.; Varilci, A.; Terzioglu, C.
- Abstract
Samples of LaCaMnCuO with 0≤ x≤0.075 were prepared by a solid state reaction and characterized. The cell parameters and volume increase with increasing doped content in all the samples. The metal-insulator (MI) transition was observed in all the samples except for x=0.075. The doping increases the MI transition temperature and resistivity. The application of a magnetic field increases the transition temperature. It can be referred to the suppression of the ferromagnetic-insulator state around it. The magnetoresistance (MR) of the undoped and 0.025 Cu-doped samples is observed on a wide range of temperatures (3.5-283 K). The undoped one exhibits a maximum value of 39.7 % at 5.07 K under 5 T. The 0.025 Cu-doped one exhibits a maximum value of 40.65 % at 44 K in the same magnetic field. No MR effect is shown for the 0.05 doped sample. The 0.075 doped sample exhibits a small negative MR behavior and a second peak of resistivity at a very low temperature.
- Subjects
MAGNETIC properties of copper; MANGANITE; LANTHANUM calcium manganese oxide; SOLID state chemistry; METAL-insulator transitions; SEMICONDUCTOR doping; ELECTRICAL resistivity; LOW temperatures
- Publication
Journal of Superconductivity & Novel Magnetism, 2013, Vol 26, Issue 5, p1441
- ISSN
1557-1939
- Publication type
Article
- DOI
10.1007/s10948-012-2024-0