I have synthesized the above nanocomposites but we are trying to know the magnetic properties and couldnt find any easiest method.
Please suggest some from your experience!
You can defeinitely try a Vibrating sample magnetometer measurements for M v.s H or B v.s H curve. it would give you a hysteresis loop with saturation magnetization and coercivities and remnant magnetization values. this would be usually the basic properties one would like to understand before going ahead. Its available in IITM and one in Madras University also.
You can defeinitely try a Vibrating sample magnetometer measurements for M v.s H or B v.s H curve. it would give you a hysteresis loop with saturation magnetization and coercivities and remnant magnetization values. this would be usually the basic properties one would like to understand before going ahead. Its available in IITM and one in Madras University also.
Have you synthesized maghemite? or hematite? Have you tried with a magnet and see if the sample is attracted?
please refer to the following paper: JACS 2005,127,8916-8917. Especially fig.3a
hematite (Fe2O3) is antiferromagnetic below its Néel temperature. So if you have pure hematite with TiO2, at ambient temperature there is nothing to do. The magnetic response will be very low. However, using a VSM ou SQUID you can do measurements at low temperatures and investigate your sample. To have quantitative information's that is the way.
because you are using Ferrite, you might as well opt for a Mossbaer spectroscopy.
U will get remarkable information and data in VSM, with temperature and magnetic field dependent..,
why don't u try SQUID! This'll give you the magnetization curve and thus, u could stdy the magnetic properties. SQUID is available at IIT ROORKEE!
Is your Fe2O3 small particles? superparamagnetic? you might need zero field cooling and field cooling (ZFC/FC) measurement. look at my topical review paper:Cobalt-based magnetic nanocomposites: fabrication, fundamentals and applications, J. Phys. D: Appl. Phys. 44 393001
Please, see our publications:
1. Phys. Rev. B 80, 155456 (2009);
2. Phys. Rev. B 73, 155423 (2006).
There you can find some theoretical apects upon the magnetic field influence on the optical properties of metal nanoparticles.
agree, use VSM or SQUID, and, if you have a chance, use Mössbauer spectroscopy. You can find references in our review article
“Superparamagnetism and other magnetic features in granular materials: A review on ideal and real systems”, M. Knobel, W.C. Nunes, L. M. Socolovsky, E. De Biasi, J. M. Vargas, J. C. Denardin; Journal of Nanoscience and Nanotechnology 8 (2008) 2836–2857
Take hysteresis curve by Vibration sample magnetometer (VSM).
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