Browsing Electronic & Electrical Eng (Scholarly Publications) by Author "COUPER, COLIN STUART"
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An improved technique for the measurement of the complex susceptibility of magnetic colloids in the microwave region
FANNIN, PAUL; COUPER, COLIN STUART (Elsevier, 2010)Measurements by means of the short-circuit (S/C) and open circuit (O/C) transmission line techniques are well established methods for investigating the magnetic and dielectric properties of magnetic colloids, respectively. ... -
Microwave absorbent properties of nanosized cobalt ferrite powders prepared by coprecipitation and subjected to different thermal treatments
FANNIN, PAUL; COUPER, COLIN STUART (Elsevier, 2011)Cobalt ferrite nanopowders were produced by means of two methods using a common precipitating agent. After precipitation, in the first method the cobalt ferrite was calcined, whilst in the second method the precipitation ... -
The resonance decay function method in the determination of the pre-factor of the neel relaxation time of single-domain nanoparticles
FANNIN, PAUL; COUPER, COLIN STUART (Elsevier, 2011)In its simple form, the relaxation time of the Neel relaxation process of the magnetic moment of single-domain particles is given by ?N=?0Nexp(?), ? being the ratio of the anisotropy energy to thermal energy. The pre-factor, ...