ISSN:
1662-8985
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
We report the transport and magnetic properties of sintered CrO2-polymer composites. Inorder to improve the elastic properties of the CrO2-based composites, we investigated two types ofstyrene-based copolymers: poly(methyl methacrylate)-styrene (9/1 and 5/5) and linear polysiloxaneg-styrene as well as poly(methyl methacrylate)–butadiene 9/1. The electric transport andmagnetoresistance are consistent with the spin tunneling model at low temperatures but thecontribution of spin independent channels becomes important at high temperature and high fields.All composites display ferromagnetism at room temperature with saturation at low fields and aslightly temperature-dependent coercive field for the samples grafted either with butadiene or withstyrene except for CrO2-polysiloxane-g-styrene composite where it exponentially decreases withincreasing temperature
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/01/40/transtech_doi~10.4028%252Fwww.scientific.net%252FAMR.47-50.326.pdf
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