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Large magnetoresistance of heavily doped

✍ Scribed by D. Akahoshi; R. Hatakeyama; H. Kuwahara

Publisher
Elsevier Science
Year
2008
Tongue
English
Weight
282 KB
Volume
403
Category
Article
ISSN
0921-4526

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✦ Synopsis

We have investigated heavily doped Nd 1Γ€x Sr x MnO 3 with 0:55pxp0:75 in detail. In 0:60pxp0:72, ferromagnetic correlation accompanying magnetoresistance (MR) is observed at low temperatures. The ferromagnetic correlation and the concomitant MR are most enhanced at x ΒΌ 0:625 where the 3z 2 Γ€ r 2 and x 2 Γ€ y 2 orbital orders compete with each other in a bicritical manner. This strongly suggests that the orbital fluctuation arising from the competition gives rise to the ferromagnetic fluctuation closely linked to the MR.

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