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λ-MnO2 nanodisks and their magnetic properties

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Ning Wang1, Xia Cao1, Guo Lin1,2 and Yang Shihe2

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In this work, highly crystalline λ-MnO2 nanodisks are synthesized via a simple microemulsion process by using polyvinylpyrrolidone (PVP) as a capping layer. Detailed information about the morphology, such as size, shape and crystallinity, was investigated by using x-ray diffraction, field emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM) as well as high resolution TEM (HRTEM). SQUID measurements were also carried out to explore the magnetic properties on the nanodisks, which may promote their future application in nanodevices and nanotechnology.


PACS

75.75.+a Magnetic properties of nanostructures

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

61.46.-w Structure of nanoscale materials

Subjects

Condensed matter: electrical, magnetic and optical

Nanoscale science and low-D systems

Dates

Issue 47 (28 November 2007)

Received 3 July 2007, in final form 3 October 2007

Published 26 October 2007



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