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Lateral surface induced effects on ultra-thin amorphous Co nanowire

Shuang-Yi Liu, Ai-Kah Soh and Liang Hong

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Lateral surface induced effects on cylindrical amorphous Co nanowires have been studied using the Monte Carlo method. The simulation results show that lateral surface induced uniaxial anisotropy has a strong influence on the magnetization of nanowires with diameters smaller than 5 nm when its value exceeds 5.0 × 105 erg cm−3. It has been found that a unique transformation from a homogeneous magnetic state to a non-uniform spin precession extension wave occurs on increasing the temperature. Moreover, the uniaxial anisotropy has little effect on the hysteresis loop when the applied magnetic field is parallel to the revolution axis of the nanowire, whereas for an applied transverse magnetic field, the influence is larger.


PACS

75.75.+a Magnetic properties of nanostructures

75.30.Gw Magnetic anisotropy

75.50.Cc Other ferromagnetic metals and alloys

75.60.Ej Magnetization curves, hysteresis, Barkhausen and related effects

75.50.Tt Fine-particle systems; nanocrystalline materials

Subjects

Condensed matter: electrical, magnetic and optical

Nanoscale science and low-D systems

Dates

Issue 21 (7 November 2009)

Received 16 June 2009, in final form 27 August 2009

Published 13 October 2009



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