Please use this identifier to cite or link to this item: http://nopr.niscair.res.in/handle/123456789/9298
Title: Variable temperature electron paramagnetic resonance investigations of an ionic ferrofluid
Authors: Gupta, S K
Pant, R P
Arora, Manju
Issue Date: Aug-2004
Publisher: CSIR
Series/Report no.: Int. Cl.7 H01F 1/44
Abstract: An aqueous based ionic ferrofluid has been studied by EPR spectroscopy technique from room temperature to liquid nitrogen temperature to detect the magnetic phase transitions and their variation at low temperatures. The line-width of EPR signal has been found to increase with decreasing temperature and this has been assigned to magnetic phase transition from ferromagnetic to a spin glass or cluster glass state mainly due to freezing of the carrier fluid. Line-width variation with temperature also suggests that bulk rotation mechanism is the dominant mode of relaxation. Any evidence of the presence of super-paramagnetism has not been observed.
Description: 305-308
URI: http://hdl.handle.net/123456789/9298
ISSN: 0975-1017 (Online); 0971-4588 (Print)
Appears in Collections:IJEMS Vol.11(4) [August 2004]

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