Magnetic and transport properties controlled by structural disorder in La₀.₇Ca₀.₃MnO₃ films
Vernadsky National Library of Ukraine
Переглянути архів Інформація| Поле | Співвідношення | |
| Title |
Magnetic and transport properties controlled by structural disorder in La₀.₇Ca₀.₃MnO₃ films
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| Creator |
Prokhorov, V.G.
Komashko, V.A. Kaminsky, G.G. Svetchnikov, V.L. Lee, Y.P. Park, S.Y. |
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| Subject |
Низкотемпеpатуpный магнетизм
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| Description |
The magnetic properties of an amorphous, a partially-disordered, and a lattice-strained crystalline La₀.₇Ca₀.₃MnO₃ film are investigated. It is shown that the amorphous film exhibits Curie- Weiss-type paramagnetism with the effective magnetic moment of 4.2 µB/Mn ion and a small ferromagnetic contribution governed by the formation of a quasi-two-dimensional crystalline interfacial inclusions. The crystalline film with nanocrystalline randomly-oriented inclusions demonstrates a superposition of ferromagnetic (in the crystalline matrix) and superparamagnetic (in the inclusions) nature. The fitted average size of the superparamagnetic particles in the case of a Langevin function is coincident with that of the nanocrystalline clusters reveated in high-resolution electron-microscopy images. An increase in the applied magnetic field leads to a reduction in the average magnetic moment of superparamagnetic particles, which is due to an enhancement of the ferromagnetic coupling between the individual randomly-oriented crystallites. The completely crystalline film undergoes only a ferromagnetic transition with a saturation magnetization at 5 K of 2.73 µB /Mn ion. |
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| Date |
2017-06-10T07:30:05Z
2017-06-10T07:30:05Z 2004 |
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| Type |
Article
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| Identifier |
Magnetic and transport properties controlled by structural disorder in La₀.₇Ca₀.₃MnO₃ films / V.G. Prokhorov, V.A. Komashko, G.G. Kaminsky, V.L. Svetchnikov, Y.P. Lee, S.Y. Park // Физика низких температур. — 2004. — Т. 30, № 9. — С. 938–944. — Бібліогр.: 21 назв. — англ.
0132-6414 PACS: 71.30.+h, 75.47.Gk, 75.47.Lx http://dspace.nbuv.gov.ua/handle/123456789/119849 |
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| Language |
en
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| Relation |
Физика низких температур
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| Publisher |
Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України
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