Synthesis of Nanocrystalline Mn-Doped Bi<sub>2</sub>Te<sub>3</sub> Thin Films via Magnetron Sputtering
This study reports the structural and magnetic properties of Mn-doped <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><msub><mi>Bi</mi><mn>2</mn></msub><msub><m...
Saved in:
| Main Authors: | , , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2025-01-01
|
| Series: | Crystals |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2073-4352/15/1/54 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1832588804257480704 |
|---|---|
| author | Joshua Bibby Angadjit Singh Emily Heppell Jack Bollard Barat Achinuq Sarah J. Haigh Gerrit van der Laan Thorsten Hesjedal |
| author_facet | Joshua Bibby Angadjit Singh Emily Heppell Jack Bollard Barat Achinuq Sarah J. Haigh Gerrit van der Laan Thorsten Hesjedal |
| author_sort | Joshua Bibby |
| collection | DOAJ |
| description | This study reports the structural and magnetic properties of Mn-doped <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><msub><mi>Bi</mi><mn>2</mn></msub><msub><mi>Te</mi><mn>3</mn></msub></mrow></semantics></math></inline-formula> thin films grown by magnetron sputtering. The films exhibit a ferromagnetic response that depends on the Mn doping concentration, as revealed by X-ray magnetic circular dichroism measurements. At an Mn concentration of ∼6.0%, a magnetic moment of (3.48 ± 0.25) <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><msub><mi mathvariant="sans-serif">μ</mi><mi mathvariant="normal">B</mi></msub></semantics></math></inline-formula>/Mn was determined. Structural analysis indicated the presence of a secondary <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><msub><mi>MnTe</mi><mi>x</mi></msub></mrow></semantics></math></inline-formula> phase, which complicates the interpretation of the magnetic properties. Additionally, the incorporation of Mn ions within the van der Waals gap and substitutional doping on Bi sites contributes to the observed complex magnetic properties. Intriguingly, a decrease in magnetic moment per Mn was observed with increasing Mn concentration, which is consistent with the formation of the intrinsic magnetic topological insulator <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><msub><mi>MnBi</mi><mn>2</mn></msub><msub><mi>Te</mi><mn>4</mn></msub></mrow></semantics></math></inline-formula>. |
| format | Article |
| id | doaj-art-e2edb0a2b76742be91261e4f220179f8 |
| institution | Kabale University |
| issn | 2073-4352 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Crystals |
| spelling | doaj-art-e2edb0a2b76742be91261e4f220179f82025-01-24T13:28:09ZengMDPI AGCrystals2073-43522025-01-011515410.3390/cryst15010054Synthesis of Nanocrystalline Mn-Doped Bi<sub>2</sub>Te<sub>3</sub> Thin Films via Magnetron SputteringJoshua Bibby0Angadjit Singh1Emily Heppell2Jack Bollard3Barat Achinuq4Sarah J. Haigh5Gerrit van der Laan6Thorsten Hesjedal7Clarendon Laboratory, Department of Physics, University of Oxford, Oxford OX1 3PU, UKClarendon Laboratory, Department of Physics, University of Oxford, Oxford OX1 3PU, UKClarendon Laboratory, Department of Physics, University of Oxford, Oxford OX1 3PU, UKClarendon Laboratory, Department of Physics, University of Oxford, Oxford OX1 3PU, UKClarendon Laboratory, Department of Physics, University of Oxford, Oxford OX1 3PU, UKDepartment of Materials, University of Manchester, Manchester M13 9PL, UKDiamond Light Source, Harwell Science and Innovation Campus, Didcot OX11 0DE, UKClarendon Laboratory, Department of Physics, University of Oxford, Oxford OX1 3PU, UKThis study reports the structural and magnetic properties of Mn-doped <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><msub><mi>Bi</mi><mn>2</mn></msub><msub><mi>Te</mi><mn>3</mn></msub></mrow></semantics></math></inline-formula> thin films grown by magnetron sputtering. The films exhibit a ferromagnetic response that depends on the Mn doping concentration, as revealed by X-ray magnetic circular dichroism measurements. At an Mn concentration of ∼6.0%, a magnetic moment of (3.48 ± 0.25) <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><msub><mi mathvariant="sans-serif">μ</mi><mi mathvariant="normal">B</mi></msub></semantics></math></inline-formula>/Mn was determined. Structural analysis indicated the presence of a secondary <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><msub><mi>MnTe</mi><mi>x</mi></msub></mrow></semantics></math></inline-formula> phase, which complicates the interpretation of the magnetic properties. Additionally, the incorporation of Mn ions within the van der Waals gap and substitutional doping on Bi sites contributes to the observed complex magnetic properties. Intriguingly, a decrease in magnetic moment per Mn was observed with increasing Mn concentration, which is consistent with the formation of the intrinsic magnetic topological insulator <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><msub><mi>MnBi</mi><mn>2</mn></msub><msub><mi>Te</mi><mn>4</mn></msub></mrow></semantics></math></inline-formula>.https://www.mdpi.com/2073-4352/15/1/54Mn-doped Bi<sub>2</sub>Te<sub>3</sub>magnetic topological insulatornanocrystalline topological insulatormagnetron sputteringX-ray magnetic circular dichroism |
| spellingShingle | Joshua Bibby Angadjit Singh Emily Heppell Jack Bollard Barat Achinuq Sarah J. Haigh Gerrit van der Laan Thorsten Hesjedal Synthesis of Nanocrystalline Mn-Doped Bi<sub>2</sub>Te<sub>3</sub> Thin Films via Magnetron Sputtering Crystals Mn-doped Bi<sub>2</sub>Te<sub>3</sub> magnetic topological insulator nanocrystalline topological insulator magnetron sputtering X-ray magnetic circular dichroism |
| title | Synthesis of Nanocrystalline Mn-Doped Bi<sub>2</sub>Te<sub>3</sub> Thin Films via Magnetron Sputtering |
| title_full | Synthesis of Nanocrystalline Mn-Doped Bi<sub>2</sub>Te<sub>3</sub> Thin Films via Magnetron Sputtering |
| title_fullStr | Synthesis of Nanocrystalline Mn-Doped Bi<sub>2</sub>Te<sub>3</sub> Thin Films via Magnetron Sputtering |
| title_full_unstemmed | Synthesis of Nanocrystalline Mn-Doped Bi<sub>2</sub>Te<sub>3</sub> Thin Films via Magnetron Sputtering |
| title_short | Synthesis of Nanocrystalline Mn-Doped Bi<sub>2</sub>Te<sub>3</sub> Thin Films via Magnetron Sputtering |
| title_sort | synthesis of nanocrystalline mn doped bi sub 2 sub te sub 3 sub thin films via magnetron sputtering |
| topic | Mn-doped Bi<sub>2</sub>Te<sub>3</sub> magnetic topological insulator nanocrystalline topological insulator magnetron sputtering X-ray magnetic circular dichroism |
| url | https://www.mdpi.com/2073-4352/15/1/54 |
| work_keys_str_mv | AT joshuabibby synthesisofnanocrystallinemndopedbisub2subtesub3subthinfilmsviamagnetronsputtering AT angadjitsingh synthesisofnanocrystallinemndopedbisub2subtesub3subthinfilmsviamagnetronsputtering AT emilyheppell synthesisofnanocrystallinemndopedbisub2subtesub3subthinfilmsviamagnetronsputtering AT jackbollard synthesisofnanocrystallinemndopedbisub2subtesub3subthinfilmsviamagnetronsputtering AT baratachinuq synthesisofnanocrystallinemndopedbisub2subtesub3subthinfilmsviamagnetronsputtering AT sarahjhaigh synthesisofnanocrystallinemndopedbisub2subtesub3subthinfilmsviamagnetronsputtering AT gerritvanderlaan synthesisofnanocrystallinemndopedbisub2subtesub3subthinfilmsviamagnetronsputtering AT thorstenhesjedal synthesisofnanocrystallinemndopedbisub2subtesub3subthinfilmsviamagnetronsputtering |