Surface segregation and charge state of La₀.₇Sr₀.₃MnO₃
Nuclear magnetic resonance and secondary ion mass-spectroscopy have been used to study the surface charge and surface chemical compositions of La₀.₇Sr₀.₃MnO₃ nanoparticles of 12 and 50-100 nm size. It is found that the surface of particles is characterized by an increased content of Sr and Mn ions t...
Збережено в:
| Дата: | 2006 |
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| Автори: | , , , , , , |
| Формат: | Стаття |
| Мова: | English |
| Опубліковано: |
НТК «Інститут монокристалів» НАН України
2006
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| Назва видання: | Functional Materials |
| Онлайн доступ: | http://dspace.nbuv.gov.ua/handle/123456789/144371 |
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| Назва журналу: | Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| Цитувати: | Surface segregation and charge state of La₀.₇Sr₀.₃MnO₃ / I.A. Danilenko, T.E. Konstantinova, G.E. Shatalova, V.N. Krivoruchko, V.D. Doroshev, V.A. Stupak, G.K. Volkova // Functional Materials. — 2006. — Т. 13, № 2. — С. 9. — Бібліогр.: 288-292 назв. — англ. |
Репозитарії
Digital Library of Periodicals of National Academy of Sciences of Ukraine| Резюме: | Nuclear magnetic resonance and secondary ion mass-spectroscopy have been used to study the surface charge and surface chemical compositions of La₀.₇Sr₀.₃MnO₃ nanoparticles of 12 and 50-100 nm size. It is found that the surface of particles is characterized by an increased content of Sr and Mn ions than the bulk, while the difference depends on particle size. The surface segregation process is considered to be a possible mechanism for cation rearrangement. Thus, the observed magnetically dead layer on a particle surface may be formed due to increase in the Sr and Mn ions concentrations up to values corresponding to an antiferromagnetic state. |
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