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<p>Hard/soft <i>x</i>[Sr<sub>0.5</sub>Ba<sub>0.5</sub>Cr<sub>0.1</sub>Fe<sub>11.9</sub>O<sub>19</sub>]/<i>y</i>[(Ni<sub>0.3</sub>Cu<sub>0.3</sub>Zn<sub>0.4</sub>)Fe<sub>2</sub>O<sub>4</sub>] (where <i>x/y</i> = 2:1; 1.5:1; 1:1; 1:1.5; 1:2) nanocomposites (NCs) (abbreviated <i>x</i>[Cr→SrBa-HF]/<i>y</i>[NiCuZn SF] NCs) in which Sr<sub>0.5</sub>Ba<sub>0.5</sub>Cr<sub>0.1</sub>Fe<sub>11.9</sub>O<sub>19</sub> hexaferrite (HF) is the hard (H) component and (Ni<sub>0.3</sub>Cu<sub>0.3</sub>Zn<sub>0.4</sub>)Fe<sub>2</sub>O<sub>4</sub> spinel ferrite (SF) is the soft (S) phase were obtained via single-pot sol-gel auto-combustion route. Both structural and morphological examinations confirmed the formation of the desired nanosized compositions with no impurity. The analysis of magnetic properties discloses ferrimagnetic-like behavior for the different NCs at both 300 and 10 K. Two-step hysteresis loops in the second quadrant of the M-H loops and two maxima in dM/dH vs. H curves are observed, revealing that the exchange couple effect is not completely achieved between the two ferrite components. M<sub>s</sub>, M<sub>r</sub>, and <InlineEquation ID="IEq1"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="10971_2025_6910_Article_IEq1.gif" Format="GIF" Height="12" Rendition="HTML" Resolution="72" Type="Linedraw" Width="23" /> </InlineMediaObject> <EquationSource Format="TEX">\({n}_{B}\)</EquationSource> <EquationSource Format="MATHML"><math> <msub> <mrow> <mi>n</mi> </mrow> <mrow> <mi>B</mi> </mrow> </msub> </math></EquationSource> </InlineEquation> values increase and have a maximum for <i>x/y</i> ~ 1.0/1.0 NCs, which start diminishing as the abundance of the SF phase further increases. On the other hand, the coercivity of NCs is found to decrease with increasing SF phase content.</p> Graphical Abstract <p></p>

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Effect of hard/soft ratio on the exchange-coupling of x[Sr0.5Ba0.5Cr0.1Fe11.9O19]/y[(Ni0.3Cu0.3Zn0.4)Fe2O4] nanocomposites

  • 期刊论文

  • 发表日期：

    2025年9月8日

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  • Yassine Slimani,
  • Munirah A. Almessiere,
  • Abdulhadi Baykal,
  • Ersin Arslan,
  • Sagar E. Shirsath

摘要

Hard/soft x[Sr0.5Ba0.5Cr0.1Fe11.9O19]/y[(Ni0.3Cu0.3Zn0.4)Fe2O4] (where x/y = 2:1; 1.5:1; 1:1; 1:1.5; 1:2) nanocomposites (NCs) (abbreviated x[Cr→SrBa-HF]/y[NiCuZn SF] NCs) in which Sr0.5Ba0.5Cr0.1Fe11.9O19 hexaferrite (HF) is the hard (H) component and (Ni0.3Cu0.3Zn0.4)Fe2O4 spinel ferrite (SF) is the soft (S) phase were obtained via single-pot sol-gel auto-combustion route. Both structural and morphological examinations confirmed the formation of the desired nanosized compositions with no impurity. The analysis of magnetic properties discloses ferrimagnetic-like behavior for the different NCs at both 300 and 10 K. Two-step hysteresis loops in the second quadrant of the M-H loops and two maxima in dM/dH vs. H curves are observed, revealing that the exchange couple effect is not completely achieved between the two ferrite components. Ms, Mr, and \({n}_{B}\) n B values increase and have a maximum for x/y ~ 1.0/1.0 NCs, which start diminishing as the abundance of the SF phase further increases. On the other hand, the coercivity of NCs is found to decrease with increasing SF phase content.

Graphical Abstract