Anisotropic magnetoresistance in low-doped La0.78Ca 0.22MnO3 crystals

V. Markovich; G. Jung; Ya Yuzhelevski; G. Gorodetsky; Ya M. Mukovskii

doi:10.1063/1.3536515

Anisotropic magnetoresistance in low-doped La_0.78Ca _0.22MnO₃ crystals

V. Markovich, G. Jung, Ya Yuzhelevski, G. Gorodetsky, Ya M. Mukovskii

Department of Physics

Research output: Contribution to journal › Article › peer-review

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Abstract

Unusual behavior of anisotropic magnetoresistance (AMR) has been encountered in low-doped La_0.78Ca_0.22MnO₃ single crystals. In contrast with previous studies of AMR in manganites, as the maximal effect was observed around T_C, the AMR of La _0.78Ca_0.22MnO₃ single crystals (T_C ≈ 189 K) increases monotonously with decreasing temperature, reaches a maximum around 140 K, and then decreases with further temperature decrease. Moreover, around the maximum, AMR increases almost linearly with magnetic fields and only at fields exceeding H ∼ 7 kOe does it start to saturate. The observed unusual enhancement of AMR may be ascribed to the changes in magnetic domain structure at temperatures below 150 K as observed previously by us using a magneto-optical imaging technique.

Original language	English
Article number	07D702
Journal	Journal of Applied Physics
Volume	109
Issue number	7
DOIs	https://doi.org/10.1063/1.3536515
State	Published - 1 Apr 2011

ASJC Scopus subject areas

General Physics and Astronomy

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10.1063/1.3536515

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title = "Anisotropic magnetoresistance in low-doped La0.78Ca 0.22MnO3 crystals",

abstract = "Unusual behavior of anisotropic magnetoresistance (AMR) has been encountered in low-doped La0.78Ca0.22MnO3 single crystals. In contrast with previous studies of AMR in manganites, as the maximal effect was observed around TC, the AMR of La 0.78Ca0.22MnO3 single crystals (TC ≈ 189 K) increases monotonously with decreasing temperature, reaches a maximum around 140 K, and then decreases with further temperature decrease. Moreover, around the maximum, AMR increases almost linearly with magnetic fields and only at fields exceeding H ∼ 7 kOe does it start to saturate. The observed unusual enhancement of AMR may be ascribed to the changes in magnetic domain structure at temperatures below 150 K as observed previously by us using a magneto-optical imaging technique.",

author = "V. Markovich and G. Jung and Ya Yuzhelevski and G. Gorodetsky and Mukovskii, {Ya M.}",

note = "Funding Information: This work was supported in part by the Israeli Science Foundation administered by the Israel Academy of Sciences and Humanities Grant No. 754/09.",

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T1 - Anisotropic magnetoresistance in low-doped La0.78Ca 0.22MnO3 crystals

AU - Markovich, V.

AU - Jung, G.

AU - Yuzhelevski, Ya

AU - Gorodetsky, G.

AU - Mukovskii, Ya M.

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PY - 2011/4/1

Y1 - 2011/4/1

N2 - Unusual behavior of anisotropic magnetoresistance (AMR) has been encountered in low-doped La0.78Ca0.22MnO3 single crystals. In contrast with previous studies of AMR in manganites, as the maximal effect was observed around TC, the AMR of La 0.78Ca0.22MnO3 single crystals (TC ≈ 189 K) increases monotonously with decreasing temperature, reaches a maximum around 140 K, and then decreases with further temperature decrease. Moreover, around the maximum, AMR increases almost linearly with magnetic fields and only at fields exceeding H ∼ 7 kOe does it start to saturate. The observed unusual enhancement of AMR may be ascribed to the changes in magnetic domain structure at temperatures below 150 K as observed previously by us using a magneto-optical imaging technique.

AB - Unusual behavior of anisotropic magnetoresistance (AMR) has been encountered in low-doped La0.78Ca0.22MnO3 single crystals. In contrast with previous studies of AMR in manganites, as the maximal effect was observed around TC, the AMR of La 0.78Ca0.22MnO3 single crystals (TC ≈ 189 K) increases monotonously with decreasing temperature, reaches a maximum around 140 K, and then decreases with further temperature decrease. Moreover, around the maximum, AMR increases almost linearly with magnetic fields and only at fields exceeding H ∼ 7 kOe does it start to saturate. The observed unusual enhancement of AMR may be ascribed to the changes in magnetic domain structure at temperatures below 150 K as observed previously by us using a magneto-optical imaging technique.

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Anisotropic magnetoresistance in low-doped La_0.78Ca _0.22MnO₃ crystals

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