Evidence for field induced proximity type behavior in ferromagnetic nanofluid

S. Sergeenkov; C. Stan; C. P. Cristescu; M. Balasoiu; N. S. Perov; C. Furtado

doi:10.1080/09500839.2017.1343959

Evidence for field induced proximity type behavior in ferromagnetic nanofluid

Materials Science 2017-08-29 v1

Authors: S. Sergeenkov , C. Stan , C. P. Cristescu , M. Balasoiu , N. S. Perov , C. Furtado

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Abstract

We report some unusual magnetic properties observed in CoFe2O4 based ferrofluid (with an average particle size of D = 6 nm). More precisely, in addition to the low-field ferromagnetic (FM) phase transition with an intrinsic Curie temperature T_Cb=350K, a second phase transition with an extrinsic Curie temperature T_Cw = 266K emerges at higher (saturating) magnetic field. The transitions meet at the crossover point T_cr = 210 K. The origin of the second transition is attributed to magnetic field induced proximity type interaction between FM particles through non-FM layers.

Keywords

ferromagnetic nanofluid ferrofluid field induced proximity effect phase transition Curie temperature

Cite

@article{arxiv.1708.08373,
  title  = {Evidence for field induced proximity type behavior in ferromagnetic nanofluid},
  author = {S. Sergeenkov and C. Stan and C. P. Cristescu and M. Balasoiu and N. S. Perov and C. Furtado},
  journal= {arXiv preprint arXiv:1708.08373},
  year   = {2017}
}

Evidence for field induced proximity type behavior in ferromagnetic nanofluid

Abstract

Keywords

Cite

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