Magnetic, Phonon and Optical Properties of Transition Metal and Rare Earth Ion Doped ZnS Nanoparticles
The surface, size and ion doping effects on the magnetic, phonon and optical properties of ZnS nanoparticles are studied based on the s-d model including spin-phonon and Coulomb interaction, and using a Green’s function theory. The changes of the properties are explained on a microscopic level, due...
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| Format: | Article |
| Language: | English |
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MDPI AG
2022-12-01
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| Series: | Nanomaterials |
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| Online Access: | https://www.mdpi.com/2079-4991/13/1/79 |
| _version_ | 1797406673229316096 |
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| author | Iliana Apostolova Angel Apostolov Julia Wesselinowa |
| author_facet | Iliana Apostolova Angel Apostolov Julia Wesselinowa |
| author_sort | Iliana Apostolova |
| collection | DOAJ |
| description | The surface, size and ion doping effects on the magnetic, phonon and optical properties of ZnS nanoparticles are studied based on the s-d model including spin-phonon and Coulomb interaction, and using a Green’s function theory. The changes of the properties are explained on a microscopic level, due to the different radii between the doping and host ions, which cause different strains—compressive or tensile, and change the exchange interaction constants in our model. The magnetization increases with increasing small transition metal (TM) and rare earth (RE) doping concentration. For larger TM dopants the magnetization decreases. The phonon energies increase with increasing TM, whereas they decrease by RE ions. The phonon damping increases for all doping ions. The changes of the band gap energy with different ion doping concentration is also studied. Band gap changes in doped semiconductors could be due as a result of exchange, s-d, Coulomb and electron-phonon interactions. We have tried to clarify the discrepancies which are reported in the literature in the magnetization and the band gap energy. |
| first_indexed | 2024-03-09T03:28:59Z |
| format | Article |
| id | doaj.art-eca4aff490da4f738e1af9e8a71f31c6 |
| institution | Directory Open Access Journal |
| issn | 2079-4991 |
| language | English |
| last_indexed | 2024-03-09T03:28:59Z |
| publishDate | 2022-12-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Nanomaterials |
| spelling | doaj.art-eca4aff490da4f738e1af9e8a71f31c62023-12-03T14:58:25ZengMDPI AGNanomaterials2079-49912022-12-011317910.3390/nano13010079Magnetic, Phonon and Optical Properties of Transition Metal and Rare Earth Ion Doped ZnS NanoparticlesIliana Apostolova0Angel Apostolov1Julia Wesselinowa2University of Forestry, Kl. Ohridsky Blvd. 10, 1756 Sofia, BulgariaUniversity of Architecture, Civil Engineering and Geodesy, Hristo Smirnenski Blvd. 1, 1046 Sofia, BulgariaSofia University “St. Kliment Ohridski”, J. Bouchier Blvd. 5, 1164 Sofia, BulgariaThe surface, size and ion doping effects on the magnetic, phonon and optical properties of ZnS nanoparticles are studied based on the s-d model including spin-phonon and Coulomb interaction, and using a Green’s function theory. The changes of the properties are explained on a microscopic level, due to the different radii between the doping and host ions, which cause different strains—compressive or tensile, and change the exchange interaction constants in our model. The magnetization increases with increasing small transition metal (TM) and rare earth (RE) doping concentration. For larger TM dopants the magnetization decreases. The phonon energies increase with increasing TM, whereas they decrease by RE ions. The phonon damping increases for all doping ions. The changes of the band gap energy with different ion doping concentration is also studied. Band gap changes in doped semiconductors could be due as a result of exchange, s-d, Coulomb and electron-phonon interactions. We have tried to clarify the discrepancies which are reported in the literature in the magnetization and the band gap energy.https://www.mdpi.com/2079-4991/13/1/79ZnS nanoparticlesmagnetizationcoercive fieldphonon energiesband gaps-d model |
| spellingShingle | Iliana Apostolova Angel Apostolov Julia Wesselinowa Magnetic, Phonon and Optical Properties of Transition Metal and Rare Earth Ion Doped ZnS Nanoparticles Nanomaterials ZnS nanoparticles magnetization coercive field phonon energies band gap s-d model |
| title | Magnetic, Phonon and Optical Properties of Transition Metal and Rare Earth Ion Doped ZnS Nanoparticles |
| title_full | Magnetic, Phonon and Optical Properties of Transition Metal and Rare Earth Ion Doped ZnS Nanoparticles |
| title_fullStr | Magnetic, Phonon and Optical Properties of Transition Metal and Rare Earth Ion Doped ZnS Nanoparticles |
| title_full_unstemmed | Magnetic, Phonon and Optical Properties of Transition Metal and Rare Earth Ion Doped ZnS Nanoparticles |
| title_short | Magnetic, Phonon and Optical Properties of Transition Metal and Rare Earth Ion Doped ZnS Nanoparticles |
| title_sort | magnetic phonon and optical properties of transition metal and rare earth ion doped zns nanoparticles |
| topic | ZnS nanoparticles magnetization coercive field phonon energies band gap s-d model |
| url | https://www.mdpi.com/2079-4991/13/1/79 |
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