Temperature dependence electron spin resonance spectra of a magnetic fluid |
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| Authors: | R V Upadhyay D Srinivas R V Mehta P M Trivedi |
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| Institution: | (1) Department of Physics, Bhavnagar University, 364 002 Bhavnagar, India;(2) Central Salt and Marine Chemical Research Institute, 364 002 Bhavnagar, India |
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| Abstract: | ESR spectra of a laboratory synthesized kerosene base magnetic fluid containing ultrafine magnetic particles (average diameter
of 100A) of Zn0.1 Fe0.9Fe2O4 are recorded at different temperatures. A narrow signal was observed above the melting point of the carrier liquid (200 K)
which can be attributed to a very small volume fraction of superparamagnetic particles in the system. The peak-to-peak line
width for both low and high field cooled configurations show an increase with decreasing temperature. This observed behaviour
has been explained by considering various energy terms which contribute to the line width. |
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| Keywords: | Magnetic fluid ESR temperature dependence |
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