| Autor: |
Acharya, Deepshikha, Bhargav, Abhinav, Tank, Tejas M., Sanyal, Sankar P. |
| Předmět: |
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| Zdroj: |
AIP Conference Proceedings; 2016, Vol. 1728 Issue 1, p020043-1-020043-4, 4p, 2 Charts, 3 Graphs |
| Abstrakt: |
Polycrystalline samples of La0.67Sr0.33Mn1-xBxO3 (with x=0, 0.05 and 0.1) and La0.67Sr0.33Mn1-xRuxO3 (with x = 0.05 and 0.1) were synthesized using the conventional solid state reaction route and found single phase in nature. Electrical resistivity measurements as a function of temperature in range 5 K-400 K and as a function of magnetic field up to 5 Tesla were performed using d.c. four-probe method. Magnetization data were acquired as a function of temperature in a range 10 K-400 K with an applied magnetic field of 500 Oe. When Mn is partially substituted by Cr and Ru the system displays dramatic changes in the electrical transport behavior and shows double-peaked feature in resistivity curve. Both Cr and Ru substitutions effectively reduce insulator-metal transition (TP) and paramagneticferromagnetic transition (TC) temperatures implying that there might exist FM interaction between Mn+3and Cr+3 as well Mn+3and Ru+4. The largest low-temperature magnetoresistance (MR%) is attributed to grain boundary effects and difference in size disorder for Cr and Ru substituted compounds. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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