Magnetic and transport properties of charge ordered La₀.₅Ca₀.₅Mn₀.₃ and La₀.₄Ca₀.₆Mn₀.₃ films
The magnetic and the transport properties of La₀.₅Ca₀.₅Mn₀.₃ and La₀.₄Ca₀.₆Mn₀.₃ films with different thickness, prepared by rf-magnetron sputtering by using the so-called «soft» (or powder) target on LaAlO₃ substrate, have been investigated. The electron-diffraction and the high-resolution elect...
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| Дата: | 2006 |
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| Автори: | , , , , , , , , |
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| Мова: | English |
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Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України
2006
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| Назва видання: | Физика низких температур |
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| Цитувати: | Magnetic and transport properties of charge ordered La₀.₅Ca₀.₅Mn₀.₃ and La₀.₄Ca₀.₆Mn₀.₃ films / V.G. Prokhorov, V.A. Komashko, G.G. Kaminsky, Y.P. Lee, S.Y. Park, Y.H. Hyun, V.L. Svetchnikov, K.W. Kim, J.Y. Rhee // Физика низких температур. — 2006. — Т. 32, № 2. — С. 176-183. — Бібліогр.: 39 назв. — англ. |
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irk-123456789-1201262017-06-12T03:03:14Z Magnetic and transport properties of charge ordered La₀.₅Ca₀.₅Mn₀.₃ and La₀.₄Ca₀.₆Mn₀.₃ films Prokhorov, V.G. Komashko, V.A. Kaminsky, G.G. Lee, Y.P. Park, S.Y. Hyun, Y.H. Svetchnikov, V.L. Kim, K.W. Rhee, J.Y. Низкотемпеpатуpный магнетизм The magnetic and the transport properties of La₀.₅Ca₀.₅Mn₀.₃ and La₀.₄Ca₀.₆Mn₀.₃ films with different thickness, prepared by rf-magnetron sputtering by using the so-called «soft» (or powder) target on LaAlO₃ substrate, have been investigated. The electron-diffraction and the high-resolution electron microscopy (HREM) studies show that the charge-ordered phase is observed at room temperature for all films. Both the paramagnetic-to-ferromagnetic transition at TC ≈ 250 K upon cooling and the appearance of an antiferromagnetic (AFM) phase at TN ≧ 140 K were observed in the La₀.₅Ca₀.₅Mn₀.₃ films, while the La₀.₄Ca₀.₆Mn₀.₃ films exhibited the AFM transition only at the same temperature, excepting the small ferromagnetic (FM) response from a «dead» layer. It was shown that the volume fraction of the FM phase in the La₀.₅Ca₀.₅Mn₀.₃ film did not exceed of and the FM phase coexisted with the AFM one at low temperature. All films manifest an exponential temperature dependence of resistance without evidence of the metal-insulator transition. This is explained by the scarcity of the FM phase for the formation of infinite percolating cluster and by an existence of the charge-ordered phase. The field-dependent magnetoresistance at low temperature is described in terms of the spin-assisted polaron-hopping model. 2006 Article Magnetic and transport properties of charge ordered La₀.₅Ca₀.₅Mn₀.₃ and La₀.₄Ca₀.₆Mn₀.₃ films / V.G. Prokhorov, V.A. Komashko, G.G. Kaminsky, Y.P. Lee, S.Y. Park, Y.H. Hyun, V.L. Svetchnikov, K.W. Kim, J.Y. Rhee // Физика низких температур. — 2006. — Т. 32, № 2. — С. 176-183. — Бібліогр.: 39 назв. — англ. 0132-6414 PACS: 75.70.-i, 75.47.-m, 71.30.+h http://dspace.nbuv.gov.ua/handle/123456789/120126 en Физика низких температур Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України |
| institution |
Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| collection |
DSpace DC |
| language |
English |
| topic |
Низкотемпеpатуpный магнетизм Низкотемпеpатуpный магнетизм |
| spellingShingle |
Низкотемпеpатуpный магнетизм Низкотемпеpатуpный магнетизм Prokhorov, V.G. Komashko, V.A. Kaminsky, G.G. Lee, Y.P. Park, S.Y. Hyun, Y.H. Svetchnikov, V.L. Kim, K.W. Rhee, J.Y. Magnetic and transport properties of charge ordered La₀.₅Ca₀.₅Mn₀.₃ and La₀.₄Ca₀.₆Mn₀.₃ films Физика низких температур |
| description |
The magnetic and the transport properties of La₀.₅Ca₀.₅Mn₀.₃ and La₀.₄Ca₀.₆Mn₀.₃ films with
different thickness, prepared by rf-magnetron sputtering by using the so-called «soft» (or powder)
target on LaAlO₃ substrate, have been investigated. The electron-diffraction and the high-resolution
electron microscopy (HREM) studies show that the charge-ordered phase is observed at room
temperature for all films. Both the paramagnetic-to-ferromagnetic transition at TC ≈ 250 K upon
cooling and the appearance of an antiferromagnetic (AFM) phase at TN ≧ 140 K were observed in
the La₀.₅Ca₀.₅Mn₀.₃ films, while the La₀.₄Ca₀.₆Mn₀.₃ films exhibited the AFM transition only at
the same temperature, excepting the small ferromagnetic (FM) response from a «dead» layer. It
was shown that the volume fraction of the FM phase in the La₀.₅Ca₀.₅Mn₀.₃ film did not exceed of
and the FM phase coexisted with the AFM one at low temperature. All films manifest an exponential
temperature dependence of resistance without evidence of the metal-insulator transition. This
is explained by the scarcity of the FM phase for the formation of infinite percolating cluster and
by an existence of the charge-ordered phase. The field-dependent magnetoresistance at low temperature
is described in terms of the spin-assisted polaron-hopping model. |
| format |
Article |
| author |
Prokhorov, V.G. Komashko, V.A. Kaminsky, G.G. Lee, Y.P. Park, S.Y. Hyun, Y.H. Svetchnikov, V.L. Kim, K.W. Rhee, J.Y. |
| author_facet |
Prokhorov, V.G. Komashko, V.A. Kaminsky, G.G. Lee, Y.P. Park, S.Y. Hyun, Y.H. Svetchnikov, V.L. Kim, K.W. Rhee, J.Y. |
| author_sort |
Prokhorov, V.G. |
| title |
Magnetic and transport properties of charge ordered La₀.₅Ca₀.₅Mn₀.₃ and La₀.₄Ca₀.₆Mn₀.₃ films |
| title_short |
Magnetic and transport properties of charge ordered La₀.₅Ca₀.₅Mn₀.₃ and La₀.₄Ca₀.₆Mn₀.₃ films |
| title_full |
Magnetic and transport properties of charge ordered La₀.₅Ca₀.₅Mn₀.₃ and La₀.₄Ca₀.₆Mn₀.₃ films |
| title_fullStr |
Magnetic and transport properties of charge ordered La₀.₅Ca₀.₅Mn₀.₃ and La₀.₄Ca₀.₆Mn₀.₃ films |
| title_full_unstemmed |
Magnetic and transport properties of charge ordered La₀.₅Ca₀.₅Mn₀.₃ and La₀.₄Ca₀.₆Mn₀.₃ films |
| title_sort |
magnetic and transport properties of charge ordered la₀.₅ca₀.₅mn₀.₃ and la₀.₄ca₀.₆mn₀.₃ films |
| publisher |
Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України |
| publishDate |
2006 |
| topic_facet |
Низкотемпеpатуpный магнетизм |
| url |
http://dspace.nbuv.gov.ua/handle/123456789/120126 |
| citation_txt |
Magnetic and transport properties of charge ordered La₀.₅Ca₀.₅Mn₀.₃ and La₀.₄Ca₀.₆Mn₀.₃ films / V.G. Prokhorov, V.A. Komashko, G.G. Kaminsky, Y.P. Lee, S.Y. Park, Y.H. Hyun, V.L. Svetchnikov, K.W. Kim, J.Y. Rhee // Физика низких температур. — 2006. — Т. 32, № 2. — С. 176-183. — Бібліогр.: 39 назв. — англ. |
| series |
Физика низких температур |
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