Effect of oxygen content on magnetization and magnetoresistance properties of CMR manganites
Vernadsky National Library of Ukraine
Переглянути архів Інформація| Поле | Співвідношення | |
| Title |
Effect of oxygen content on magnetization and magnetoresistance properties of CMR manganites
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| Creator |
Trukhanov, S.V.
Troyanchuk, I.O. Korshunov, F.P. Sirenko, V.A. Szymczak, H. Baerner, K. |
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| Subject |
Специальный выпуск Низкотемпеpатуpная магнитостpикция магнетиков и свеpхпpоводников Под редакцией В. В. Еременко и В. А. Сиренко
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| Description |
The influence of oxygen content on the magnetization and electrical resistivity of Ln₀.₅A₀.₅MnO₃ (Ln=La,Pr,Nd; A=Ca,Ba) manganites with the perovskite structure is investigated. It is shown that the La₀.₅Ca₀.₅MnO₃₋γ compound undergoes a sequence of transitions from an antiferromagnetic (γ=0) to a spin-glass (γ=0.17) state and then to an inhomogeneous ferromagnetic (γ=0.3) state. A transition from an antiferromagnetic charge-ordered state to a ferromagnetic charge-disordered state in Nd₀.₅Ca₀.₅ MnO₃₋γ is observed as the oxygen content is reduced to where γ=0.07. The Nd₀.₅Ba₀.₅ MnO₃₋γcompound shows an increase of the Curie point from 110 K (γ=0) up to 310 K (γ=0.3). In addition, a large magnetoresistance is revealed which develops below their Curie temperature despite the absence of Mn³⁺√Mn⁴⁺ pairs. A Zener double-exchange interaction is usually used in literature to explain the magnetic and electrical properties of hole-doped perovskite manganites. The data obtained support the mechanism of superexchange interactions between magnetic moments of the manganese ions via oxygen.
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| Date |
2018-02-04T16:38:30Z
2018-02-04T16:38:30Z 2001 |
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| Type |
Article
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| Identifier |
Effect of oxygen content on magnetization and magnetoresistance properties of CMR manganites / S.V. Trukhanov, I.O. Troyanchuk, F.P. Korshunov, V.A. Sirenko, H. Szymczak, K. Baerner // Физика низких температур. — 2001. — Т. 27, № 4. — С. 385-391. — Бібліогр.: 30 назв. — англ.
0132-6414 PACS: 75.30.Vn, 75.30.Cr http://dspace.nbuv.gov.ua/handle/123456789/130015 |
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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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