Emission Mössbauer study of CMR manganite La₀.₈Ca₀.₂MnO₃. II. Step-by-step snapshots of the metal-insulator transition
We follow the step-by-step progression of events while approaching the Curie temperature Tc from below using ⁵⁷Co substituent as a microprobe in an emission Mössbauer study combined with resistivity measurements. In the temperature range 0.33<T/Tc ≤ 1, the material consists of a mixture of ferrom...
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| Дата: | 1997 |
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| Автори: | , , , , |
| Формат: | Стаття |
| Мова: | English |
| Опубліковано: |
Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України
1997
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| Назва видання: | Физика низких температур |
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| Онлайн доступ: | http://dspace.nbuv.gov.ua/handle/123456789/175714 |
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| Назва журналу: | Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| Цитувати: | Emission Mössbauer study of CMR manganite La₀.₈Ca₀.₂MnO₃. II. Step-by-step snapshots of the metal-insulator transition / V. Chechersky, K. Nomura, A. Nath, H. Ju, R.L. Greene // Физика низких температур. — 1997. — Т. 23, № 7. — С. 731-737. — Бібліогр.: 29 назв. — англ. |
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Digital Library of Periodicals of National Academy of Sciences of Ukraine| id |
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irk-123456789-1757142021-07-24T21:30:29Z Emission Mössbauer study of CMR manganite La₀.₈Ca₀.₂MnO₃. II. Step-by-step snapshots of the metal-insulator transition Chechersky, V. Nomura, K. Nath, A. Ju, H. Greene, R.L. Низкотемпеpатуpный магнетизм We follow the step-by-step progression of events while approaching the Curie temperature Tc from below using ⁵⁷Co substituent as a microprobe in an emission Mössbauer study combined with resistivity measurements. In the temperature range 0.33<T/Tc ≤ 1, the material consists of a mixture of ferromagnetic and paramagnetic regions within the same matrix. An increase of the amount of paramagnetic fraction is accompanied by a decrease in electron delocalization in the ferromagnetic regions. At T≥Tc, the electrons are localized to neighboring Mn⁴⁺/Mn³⁺ pairs only, in about 46% of the paramagnetic species. The strength with which Mn atoms are bound to the neighbors also decreases progressively and rather steeply in the range 0.65<T/Tc=1. Zero field resistivity, ρ0, follows linearly with the amount of the paramagnetic phase in the range 0.65<T/Tc<1 and still shows metal-like behavior up to T/Tc≈1.03. Remove selected 1997 Article Emission Mössbauer study of CMR manganite La₀.₈Ca₀.₂MnO₃. II. Step-by-step snapshots of the metal-insulator transition / V. Chechersky, K. Nomura, A. Nath, H. Ju, R.L. Greene // Физика низких температур. — 1997. — Т. 23, № 7. — С. 731-737. — Бібліогр.: 29 назв. — англ. 0132-6414 PACS:76.80.+y http://dspace.nbuv.gov.ua/handle/123456789/175714 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 Chechersky, V. Nomura, K. Nath, A. Ju, H. Greene, R.L. Emission Mössbauer study of CMR manganite La₀.₈Ca₀.₂MnO₃. II. Step-by-step snapshots of the metal-insulator transition Физика низких температур |
| description |
We follow the step-by-step progression of events while approaching the Curie temperature Tc from below using ⁵⁷Co substituent as a microprobe in an emission Mössbauer study combined with resistivity measurements. In the temperature range 0.33<T/Tc ≤ 1, the material consists of a mixture of ferromagnetic and paramagnetic regions within the same matrix. An increase of the amount of paramagnetic fraction is accompanied by a decrease in electron delocalization in the ferromagnetic regions. At T≥Tc, the electrons are localized to neighboring Mn⁴⁺/Mn³⁺ pairs only, in about 46% of the paramagnetic species. The strength with which Mn atoms are bound to the neighbors also decreases progressively and rather steeply in the range 0.65<T/Tc=1. Zero field resistivity, ρ0, follows linearly with the amount of the paramagnetic phase in the range 0.65<T/Tc<1 and still shows metal-like behavior up to T/Tc≈1.03.
Remove selected |
| format |
Article |
| author |
Chechersky, V. Nomura, K. Nath, A. Ju, H. Greene, R.L. |
| author_facet |
Chechersky, V. Nomura, K. Nath, A. Ju, H. Greene, R.L. |
| author_sort |
Chechersky, V. |
| title |
Emission Mössbauer study of CMR manganite La₀.₈Ca₀.₂MnO₃. II. Step-by-step snapshots of the metal-insulator transition |
| title_short |
Emission Mössbauer study of CMR manganite La₀.₈Ca₀.₂MnO₃. II. Step-by-step snapshots of the metal-insulator transition |
| title_full |
Emission Mössbauer study of CMR manganite La₀.₈Ca₀.₂MnO₃. II. Step-by-step snapshots of the metal-insulator transition |
| title_fullStr |
Emission Mössbauer study of CMR manganite La₀.₈Ca₀.₂MnO₃. II. Step-by-step snapshots of the metal-insulator transition |
| title_full_unstemmed |
Emission Mössbauer study of CMR manganite La₀.₈Ca₀.₂MnO₃. II. Step-by-step snapshots of the metal-insulator transition |
| title_sort |
emission mössbauer study of cmr manganite la₀.₈ca₀.₂mno₃. ii. step-by-step snapshots of the metal-insulator transition |
| publisher |
Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України |
| publishDate |
1997 |
| topic_facet |
Низкотемпеpатуpный магнетизм |
| url |
http://dspace.nbuv.gov.ua/handle/123456789/175714 |
| citation_txt |
Emission Mössbauer study of CMR manganite La₀.₈Ca₀.₂MnO₃. II. Step-by-step snapshots of the metal-insulator transition / V. Chechersky, K. Nomura, A. Nath, H. Ju, R.L. Greene // Физика низких температур. — 1997. — Т. 23, № 7. — С. 731-737. — Бібліогр.: 29 назв. — англ. |
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Физика низких температур |
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