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Maximum energy product of exchange-coupled Sm(FeCo)12/α-Fe nanocomposite particle.
- Source :
- AIP Advances; Feb2023, Vol. 13 Issue 2, p1-7, 7p
- Publication Year :
- 2023
-
Abstract
- The effects of the coating surface orientation of the α-Fe soft magnetic layer on the Sm(Fe<subscript>0.8</subscript>Co<subscript>0.2</subscript>)<subscript>12</subscript> hard magnetic phase and the volume fraction of α-Fe, V<subscript>Fe</subscript>, on the maximum energy product, (BH)<subscript>max</subscript> of exchange-coupled Sm(Fe<subscript>0.8</subscript>Co<subscript>0.2</subscript>)<subscript>12</subscript>/α-Fe nanocomposite magnet particles were micromagnetics OOMMF package was systematically investigated. The (BH)<subscript>max</subscript> of the reference model, Sm(Fe<subscript>0.8</subscript>Co<subscript>0.2</subscript>)<subscript>12</subscript> particles without Fe layer, was 630 kJ/m<superscript>3</superscript>. In contrast, in the nanocomposite magnet particle model with soft magnetic layers on both sides of the hard magnetic phase, (BH)<subscript>max</subscript> reached a maximum value of 657 kJ/m<superscript>3</superscript> at V<subscript>Fe</subscript> = 12% (Fe layer thickness, t<subscript>Fe</subscript> = 2 nm). In the model with α-Fe coating on the top and bottom surfaces of the hard magnetic phase, (BH)<subscript>max</subscript> = 636 kJ/m<superscript>3</superscript> at V<subscript>Fe</subscript> = 4% (t<subscript>Fe</subscript> = 2 nm). Furthermore, the coating of the soft magnetic phase on both sides of the hard phase particles reduces the magnitude of the demagnetizing field, H<subscript>d</subscript> of the nanocomposite magnet particles, indicating that the side coating of the soft magnetic phase is effective in increasing (BH)<subscript>max</subscript>. These findings allow for a greater degree of freedom in the design of nanocomposite magnets by adjusting not only the V<subscript>Fe</subscript> volume fraction of the hard/soft phases but also their arrangement. [ABSTRACT FROM AUTHOR]
- Subjects :
- NANOCOMPOSITE materials
MICROMAGNETICS
DEGREES of freedom
SURFACE coatings
MAGNETS
Subjects
Details
- Language :
- English
- ISSN :
- 21583226
- Volume :
- 13
- Issue :
- 2
- Database :
- Complementary Index
- Journal :
- AIP Advances
- Publication Type :
- Academic Journal
- Accession number :
- 162171638
- Full Text :
- https://doi.org/10.1063/9.0000506