Hello,
I want to know that can curie temperature change significantly with decreasing the size of particles?
In more detail, As you know the curie temperature of bulk Fe3O4 is about 850 K. How much it can change when they are in the nanometer range (superparamagnetic Fe3O4 NPs)?
Yes the thermal behavior changing with the particle size reducing to the level of nano, where, the themal conductivity, melting temperature, and critical (Curie) temperature are changing.The endothermic trend increasing and then fast shifting to the exothermic direction.
I hope it helps
It depends upon what you mean by "significantly."
If you mean "can it change measurably", the answer is: Yes, it can.
Are you looking for theories that help you analyze YOUR experimental data?
Or: Are you looking for experimental data to fit YOUR theory?
Do a literature search, and you will find both types of papers.
Yes the thermal behavior changing with the particle size reducing to the level of nano, where, the themal conductivity, melting temperature, and critical (Curie) temperature are changing.The endothermic trend increasing and then fast shifting to the exothermic direction.
I hope it helps
The relation between the Curie Temperature (TC) between the reduced dimension or nano particles of diameter D (TC(D)) and the bulk material (TC(bulk)) is:
(TC(bulk) -TC(D))/(TC(bulk))=(Xi/D)^Lamda. Where, Xi=corelation length and Lamda = displacement exponent = 1.10.
Follow the ref.: L. He et al., J. Appl. Phys. 102, 103911-103914 (2007).
Thank to all for your helpfull responces.
According to your suitable answers I figured out that the curie temperture of Fe3O4 nanoparticles can reduce about 730 K but in bulk is about 850 K.
Thank you so much
Mr. N. K. Jaggi, can you send for us 2 references for experimental data to fit our theory?
You received the answers and suggestions. The most important is that the particle and grain size have influence on the Curie temperature. Many published articles are referred to that
Dear Prof. Stojanović,
Thank you so much for your attention and helpful answer.
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