FMR and EPR in Ni@C nanocomposites: Size and concentration effects
- Авторлар: Sharoyan E.G.1, Mirzakhanyan A.A.1, Gyulasaryan H.T.1, Kocharian A.N.2, Manukyan A.S.1
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Мекемелер:
- Institute for Physical Research
- California State University
- Шығарылым: Том 52, № 2 (2017)
- Беттер: 147-154
- Бөлім: Article
- URL: https://journals.rcsi.science/1068-3372/article/view/228337
- DOI: https://doi.org/10.3103/S1068337217020086
- ID: 228337
Дәйексөз келтіру
Аннотация
One-domain Ni@C nanoparticles encapsulated in carbon coating have been investigated depending on the size and concentration of Ni in carbon. The nanoparticles of nickel were prepared with the average diameters changing in a broad range of 4–45 nm, and the concentration of Ni in C varies in 2–12 wt%. To prepare the Ni@C nanocomposites the solid solutions of nickel phthalocyanine–metal-free phthalocyanine (NiPc)x(H2Pc)1–x, 0 ≤ x ≤ 1 were synthesized and the solidphase pyrolysis of these compounds was performed. In the case of ultradispersive Ni nanoparticles (the interval of quantum dots is 1–10 nm), a considerable shift of the resonance field and broadening of resonance absorption field were revealed in the spectra of FMR at room temperature. The data were interpreted taking into account the essential contribution of the surface magnetic anisotropy, the magnetic field of which far exceeds the magnetic field of volume anisotropy.
Негізгі сөздер
Авторлар туралы
E. Sharoyan
Institute for Physical Research
Email: manukyan.ipr@gmail.com
Армения, Ashtarak
A. Mirzakhanyan
Institute for Physical Research
Email: manukyan.ipr@gmail.com
Армения, Ashtarak
H. Gyulasaryan
Institute for Physical Research
Email: manukyan.ipr@gmail.com
Армения, Ashtarak
A. Kocharian
California State University
Email: manukyan.ipr@gmail.com
АҚШ, Los Angeles
A. Manukyan
Institute for Physical Research
Хат алмасуға жауапты Автор.
Email: manukyan.ipr@gmail.com
Армения, Ashtarak
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