Theoretical investigations of magnetic properties of ferromagnetic single-layered nanobelts

The magnetic properties of ferromagnetic (FM) single‐layered nanobelts are investigated if there exists a single‐ion anisotropy. The magnetic quantities as functions of belt width and temperature are calculated. The spontaneous magnetization, area of the hysteresis loop, and energy level extension i...

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Bibliographic Details
Published in:Physica Status Solidi (b) 2011-05, Vol.248 (5), p.1280-1286
Main Authors: Mi, Bin-Zhou, Wang, Huai-Yu, Zhou, Yun-Song
Format: Article
Language:English
Subjects:
Belts
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Curie temperature
Exact sciences and technology
Ferromagnetism
Heisenberg model
Magnetic properties
Magnetic properties and materials
Magnetic properties of nanostructures
Mathematical analysis
Nanocomposites
Nanomaterials
Nanostructure
nanostructures
Physics
quantized spin models
quantum ensemble theory
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Summary:The magnetic properties of ferromagnetic (FM) single‐layered nanobelts are investigated if there exists a single‐ion anisotropy. The magnetic quantities as functions of belt width and temperature are calculated. The spontaneous magnetization, area of the hysteresis loop, and energy level extension increase with belt width, and decrease with temperature. The Curie temperature increases with belt width. The energy spectra are calculated. When the belt width is fixed, a higher temperature leads to lower energy spectra. The spin‐wave energy, as well as the energy level extension, drops with temperature rising, and becomes zero as the temperature reaches the Curie temperature. The results are compared with those of FM single‐walled nanotubes. The Curie point TC of a nanobelt is always smaller than that of a nanotube, when the width of the former and the perimeter of the latter are equal, and the reason is analyzed.
ISSN:0370-1972
1521-3951
1521-3951
DOI:10.1002/pssb.201046394