Low temperature magnetization of MnxFe1-xO-Fe2o3 ferrofluids

Herng-Er Horng, I. J. Jang, K. L. Kung, Y. D. Yao, Hong-Chang Yang, Chin Yih Hong

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    6 Citations (Scopus)

    Abstract

    Magnetization of freezing MnxFe1-xO-Fe2o3 (x=0,0.1.1) ferrofluids was investigated systematically. Kerosenebased ferrofluids were produced by co-precipitation method and we found that the average particle size increases from 118 Å to 178 Å with increasing of Mn concentration. It is also found that the blocking temperature TB increasing as Mn concentration decreasing. It shows that the increase of the Mn concentration resulted in increasing of the particles size would dismiss the blocking and hence decrease the relaxation time. The magnetic measurement shows the Curie law of superparamagnetic particles in the liquid region while it reveals the Curie-Weiss law in the unblocked solid region.

    Original languageEnglish
    Pages (from-to)2023-2024
    Number of pages2
    JournalCzechoslovak Journal of Physics
    Volume46
    Issue numberSUPPL. 4
    DOIs
    Publication statusPublished - 1996 Dec 1

    ASJC Scopus subject areas

    • Physics and Astronomy(all)

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