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Title

Low-temperature magnetoresistance of biaxially strained 24-nm-thick La<sub>0.67</sub>Ca<sub>0.33</sub>MnO<sub>3</sub> films.

Authors

Boikov, Yu. A.; Volkov, M. P.; Danilov, V. A.

Abstract

The lateral unit cell parameter in nanodimensional La0.67Ca0.33MnO3 (LCMO) films grown on (001)-oriented LaAlO3 substrates is significantly (approximately 4%) smaller than the value measured along the normal to the substrate plane. At T &lt; 140 K, the temperature dependence of the resistivity ρ of LCMO films follows the relation ρ − ρ ( T = 4.2 K) ≈ρ2( H) T4.5, where ρ2 is independent of the temperature but decreases with increasing magnetic field H. It is shown that this decrease is related both to a decay of the spin waves in ferromagnetic domains and to the transformation of antiferromagnetic phase inclusions into ferromagnetic ones.

Subjects

MAGNETORESISTANCE; MAGNETIC fields; SPIN waves; ANTIFERROMAGNETISM; FERROMAGNETISM; LOW temperatures

Publication

Technical Physics Letters, 2009, Vol 35, Issue 6, p532

ISSN

1063-7850

Publication type

Academic Journal

DOI

10.1134/S1063785009060157