Effect of Mn-substitution on coercivity of SrFe8Al4O19 nanocrystals
The effect of manganese (Mn) substitution on the magnetic properties of SrFe8−xMnxAl4O19 nanocrystals has been investigated via precise compositional modulation with x = 0, 0.25, 0.50, 0.75, and 1.0. Rod-shaped nanocrystals with hexagonal crystal structure and an average crystallite-size of 25 nm we...
Saved in:
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
AIP Publishing LLC
2025-03-01
|
| Series: | AIP Advances |
| Online Access: | http://dx.doi.org/10.1063/9.0000926 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1849770157867532288 |
|---|---|
| author | Pramanand Joshi Hur Abbas Tej Raj Karki Jeotikanta Mohapatra J. Ping Liu |
| author_facet | Pramanand Joshi Hur Abbas Tej Raj Karki Jeotikanta Mohapatra J. Ping Liu |
| author_sort | Pramanand Joshi |
| collection | DOAJ |
| description | The effect of manganese (Mn) substitution on the magnetic properties of SrFe8−xMnxAl4O19 nanocrystals has been investigated via precise compositional modulation with x = 0, 0.25, 0.50, 0.75, and 1.0. Rod-shaped nanocrystals with hexagonal crystal structure and an average crystallite-size of 25 nm were synthesized via sol-gel method. Magnetic property measurements have been conducted including hysteresis loops and singular point detection (SPD) to investigate the impact of Mn-substitution on magnetic hardening of SrFe8Al4O19 nanocrystals. An increase in Mn-concentration from x = 0 to x = 1.0 resulted in a significant increase in magnetic coercivity from 12.5 to 17 kOe. This increasing trend in coercivity with higher Mn-content is attributed to the enhanced magnetocrystalline anisotropy (MCA). Further, Bloch’s law fittings of the temperature-dependent magnetization data revealed an increase in the value of Bloch’s constant B with an increase in Mn-content, indicating weak exchange interactions that effectively boosted the magnetic anisotropy and increased the coercivity. |
| format | Article |
| id | doaj-art-bfb0917bbc53400693cfc695d0ba526e |
| institution | DOAJ |
| issn | 2158-3226 |
| language | English |
| publishDate | 2025-03-01 |
| publisher | AIP Publishing LLC |
| record_format | Article |
| series | AIP Advances |
| spelling | doaj-art-bfb0917bbc53400693cfc695d0ba526e2025-08-20T03:03:07ZengAIP Publishing LLCAIP Advances2158-32262025-03-01153035124035124-610.1063/9.0000926Effect of Mn-substitution on coercivity of SrFe8Al4O19 nanocrystalsPramanand Joshi0Hur Abbas1Tej Raj Karki2Jeotikanta Mohapatra3J. Ping Liu4Department of Physics, University of Texas at Arlington, Arlington, Texas 76019, USADepartment of Physics, University of Texas at Arlington, Arlington, Texas 76019, USADepartment of Physics, University of Texas at Arlington, Arlington, Texas 76019, USADepartment of Physics, University of Texas at Arlington, Arlington, Texas 76019, USADepartment of Physics, University of Texas at Arlington, Arlington, Texas 76019, USAThe effect of manganese (Mn) substitution on the magnetic properties of SrFe8−xMnxAl4O19 nanocrystals has been investigated via precise compositional modulation with x = 0, 0.25, 0.50, 0.75, and 1.0. Rod-shaped nanocrystals with hexagonal crystal structure and an average crystallite-size of 25 nm were synthesized via sol-gel method. Magnetic property measurements have been conducted including hysteresis loops and singular point detection (SPD) to investigate the impact of Mn-substitution on magnetic hardening of SrFe8Al4O19 nanocrystals. An increase in Mn-concentration from x = 0 to x = 1.0 resulted in a significant increase in magnetic coercivity from 12.5 to 17 kOe. This increasing trend in coercivity with higher Mn-content is attributed to the enhanced magnetocrystalline anisotropy (MCA). Further, Bloch’s law fittings of the temperature-dependent magnetization data revealed an increase in the value of Bloch’s constant B with an increase in Mn-content, indicating weak exchange interactions that effectively boosted the magnetic anisotropy and increased the coercivity.http://dx.doi.org/10.1063/9.0000926 |
| spellingShingle | Pramanand Joshi Hur Abbas Tej Raj Karki Jeotikanta Mohapatra J. Ping Liu Effect of Mn-substitution on coercivity of SrFe8Al4O19 nanocrystals AIP Advances |
| title | Effect of Mn-substitution on coercivity of SrFe8Al4O19 nanocrystals |
| title_full | Effect of Mn-substitution on coercivity of SrFe8Al4O19 nanocrystals |
| title_fullStr | Effect of Mn-substitution on coercivity of SrFe8Al4O19 nanocrystals |
| title_full_unstemmed | Effect of Mn-substitution on coercivity of SrFe8Al4O19 nanocrystals |
| title_short | Effect of Mn-substitution on coercivity of SrFe8Al4O19 nanocrystals |
| title_sort | effect of mn substitution on coercivity of srfe8al4o19 nanocrystals |
| url | http://dx.doi.org/10.1063/9.0000926 |
| work_keys_str_mv | AT pramanandjoshi effectofmnsubstitutiononcoercivityofsrfe8al4o19nanocrystals AT hurabbas effectofmnsubstitutiononcoercivityofsrfe8al4o19nanocrystals AT tejrajkarki effectofmnsubstitutiononcoercivityofsrfe8al4o19nanocrystals AT jeotikantamohapatra effectofmnsubstitutiononcoercivityofsrfe8al4o19nanocrystals AT jpingliu effectofmnsubstitutiononcoercivityofsrfe8al4o19nanocrystals |