Physics – Condensed Matter – Materials Science
Scientific paper
1999-07-08
Physica B, 284-288 (2000) 1988
Physics
Condensed Matter
Materials Science
2 pages,2 EPS figures, LT22 Proceedings, to appear in Physica B
Scientific paper
10.1016/S0921-4526(99)02957-9
A sharp distinction between magnetoresistance (MR) behavior for the magnetic fields applied perpendicular (H_{perp}) and parallel (H_{par}) to the film plane is found in colossal-magnetoresistance film La_{1-x}Ca_{x}MnO_{3} (x \approx 3). At increasing of H_{perp} the MR is first negative (at H_{perp} < 4 kOe), then positive (4 kOe < H_{perp} < 12 kOe), and then negative again (H_{perp} > 12 kOe). At increasing of H_{par} the MR is positive below H_{par} \simeq 6 kOe and negative above it. In both cases the magnetic field was perpendicular to the current. The anisotropic behavior of this kind occurs only at low temperatures (T < 18 K) and is quite different from the results of previous studies.
Belevtsev B. I.
Krasovitsky V. B.
Naugle D. G.
Parasiris A.
Rathnayaka K. D. D.
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