Synthesis and magnetic study of magnetically hard-soft SrFe12-yAlyO19 - x Wt.% Ni0.5Zn0.5Fe2O4 nanocomposites | Zendy

Dipesh Neupane | Zendy; Madhav Ghimire | Zendy; Hitesh Adhikari | Zendy; A. Lisfi | Zendy; Sanjay R. Mishra | Zendy

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Synthesis and magnetic study of magnetically hard-soft SrFe12-yAlyO19 - x Wt.% Ni0.5Zn0.5Fe2O4 nanocomposites

Author(s) -

Dipesh Neupane,

Madhav Ghimire,

Hitesh Adhikari,

A. Lisfi,

Sanjay R. Mishra

Publication year - 2017

Publication title -

aip advances

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.421

H-Index - 58

ISSN - 2158-3226

DOI - 10.1063/1.4978398

Subject(s) - nanocomposite , remanence , materials science , curie temperature , crystallinity , phase (matter) , magnetization , magnetic anisotropy , analytical chemistry (journal) , magnetic field , condensed matter physics , nuclear magnetic resonance , composite material , ferromagnetism , chemistry , physics , organic chemistry , chromatography , quantum mechanics

Pure phase exchange coupled nanocomposites of magnetically hard-soft oxides, (hard) SrFe12-yAlyO19 -(soft) x Wt.% Ni0.5Zn0.5Fe2O4 were prepared via one-pot autocombustion method. The hard-phase magnetic anisotropy was systematically varied via Al3+ doping and magnetic properties of the nanocomposites were assessed as a function of magnetic soft-phase content in the nanocomposite. As synthesized, ferrites were assessed for phase composition, crystallinity, and magnetic properties by using XRD and VSM respectively. Exchange coupling behavior was observed in nanocomposites for all soft phase content in the low field region up to 1200 Oe. Also, exchange coupling was observed to weaken with increase in Al3+ content in the hard phase of the composite. As a result of hard-soft exchange coupling, the saturation magnetization, reduced remanence, and Curie temperature were observed to be higher than those of pure SrFe12O19 hexaferrite. The present study is novel in its approach of tuning magnetic parameters of exchange-spring nanocomposites via systematically controlling magnetic parameters of the hard phase and content of the soft phase

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