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Nature of magnetic ...
Nature of magnetic ordering in nanocomposites of Zn1-pNipO and NiO
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- Joshi, D. C. (författare)
- Indian Inst Technol, Dept Phys, Gauhati 781039, Assam, India
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- Pramanik, P. (författare)
- Indian Inst Technol, Dept Phys, Gauhati 781039, Assam, India
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- George, R. T. (författare)
- Indian Inst Technol, Dept Phys, Gauhati 781039, Assam, India
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- Sarkar, Tapati (författare)
- Uppsala universitet,Fasta tillståndets fysik
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- Thota, S. (författare)
- Indian Inst Technol, Dept Phys, Gauhati 781039, Assam, India
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(creator_code:org_t)
- ELSEVIER SCIENCE BV, 2018
- 2018
- Engelska.
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Ingår i: Physica. E, Low-Dimensional systems and nanostructures. - : ELSEVIER SCIENCE BV. - 1386-9477 .- 1873-1759. ; 103, s. 46-52
- Relaterad länk:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- A detailed study of the nature of magnetic exchange interactions and anisotropy in Zn-1_pNipO/NiO (0 <= p <= 1) two-phase nanocomposites is reported. The exchange constants |J(1)| and |J(2)| have been determined using the molecular field approximation for the two sublattice model which yields |J(2)| similar to 11.26 meV and |J(1)| similar to 7.17meV for p = 1, consistent with type-II antiferromagnetic ordering (i.e. |J2|>>|J(1)|). A novel core-shell surface layer model has been employed to explain the nature of magnetic anisotropy in these nanocomposites which yields anisotropy constants K-surface= 2.42 erg/cm(2), K-bulk = 2.61 x 10(6) erg/cm(3) and K-Shell = 9.56 x 10(5) erg/cm(3) for shell thickness d(Sh) similar to 1.34 nm (p = 1).
Ämnesord
- NATURVETENSKAP -- Fysik -- Den kondenserade materiens fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Condensed Matter Physics (hsv//eng)
Nyckelord
- Sol-gel process
- Nanocomposites
- Neel temperature
- Anisotropy
- Exchange constants2010 MSC
- 00-01
- 99-00
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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