As we know that magnetic particles like Fe3O4 particles will align along the magnetic field and probably form a spike-like structure in bulky powder state. The interparticles are magnetized and attracted to each other so that they align to the magnetic field linearly.
I just wonder whether we could have magnetic particles that can be response to the magnetic field but individual particles dont attract to each other so that a linear alignment will not form. It seems to be impossible but it will be very interesting if we have this material. Does anyone know this?
It is interesting but studied already (I think).
But this is controllable by controlling the inter-particle interaction.
You can find number of literature on this.
You can look on these;It may help.
https://www.ncbi.nlm.nih.gov/pubmed/19198326/
http://pubs.acs.org/doi/pdf/10.1021/jp0464526
Good Luck
I do not know if the attached comments and photo will be of help, as I do not know your particular application.
Hopefully I say something in my attached reply (maybe paragraph 5) that may be of some help, or provide some helpful clue.
Dr N Allen
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