Epitaxial Growth of Ni-Mn-Ga on Al<sub>2</sub>O<sub>3</sub>(<inline-formula><math display="inline"><semantics><mrow><mn mathvariant="bold">11</mn><mover accent="true"><mn mathvariant="bold">2</mn><mo stretchy="false">¯</mo></mover><mn mathvariant="bold">0</mn></mrow></semantics></math></inline-formula>) Single-Crystal Substrates by Pulsed Laser Deposition
Magnetic shape memory alloys have attracted considerable attention due to their multifunctional properties. Among these materials, Ni-Mn-Ga alloys are distinguished by their ability to achieve up to 10% strain when exposed to a magnetic field, a characteristic predominantly observed in single-crysta...
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2025-05-01
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| author | Manuel G. Pinedo-Cuba José M. Caicedo-Roque Jessica Padilla-Pantoja Justiniano Quispe-Marcatoma Carlos V. Landauro Víctor A. Peña-Rodríguez José Santiso |
| author_facet | Manuel G. Pinedo-Cuba José M. Caicedo-Roque Jessica Padilla-Pantoja Justiniano Quispe-Marcatoma Carlos V. Landauro Víctor A. Peña-Rodríguez José Santiso |
| author_sort | Manuel G. Pinedo-Cuba |
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| description | Magnetic shape memory alloys have attracted considerable attention due to their multifunctional properties. Among these materials, Ni-Mn-Ga alloys are distinguished by their ability to achieve up to 10% strain when exposed to a magnetic field, a characteristic predominantly observed in single-crystal samples. Consequently, it is essential to develop nanomaterials with a crystal structure closely resembling that of a single crystal. In this study, an epitaxial Ni-Mn-Ga thin film was fabricated using Pulsed Laser Deposition on an Al<sub>2</sub>O<sub>3</sub> <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mo>(</mo><mn>11</mn><mover accent="true"><mn>2</mn><mo stretchy="false">¯</mo></mover><mn>0</mn><mo>)</mo></mrow></semantics></math></inline-formula> single-crystal substrate. The crystal structure was characterised through X-ray diffraction methodologies, such as symmetrical <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mn>2</mn><mi>θ</mi><mo>−</mo><mi>ω</mi></mrow></semantics></math></inline-formula> scans, pole figures, and reciprocal space maps. The results indicated that the sample was mainly in a slightly distorted cubic austenite phase, and some incipient martensite phase also appeared. A detailed microstructural analysis, performed by transmission electron microscopy, confirmed that certain regions of the sample exhibited an incipient transformation to the martensite phase. Regions closer to the substrate retained the austenite phase, suggesting that the constraint imposed by the substrate inhibits the phase transition. These results indicate that it is possible to grow high crystalline quality thin films of Ni-Mn-Ga by Pulsed Laser Deposition. |
| format | Article |
| id | doaj-art-00eca02c0a8c4e8095d4c023388dabc5 |
| institution | Kabale University |
| issn | 2571-9637 |
| language | English |
| publishDate | 2025-05-01 |
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| spelling | doaj-art-00eca02c0a8c4e8095d4c023388dabc52025-08-20T03:26:56ZengMDPI AGSurfaces2571-96372025-05-01823510.3390/surfaces8020035Epitaxial Growth of Ni-Mn-Ga on Al<sub>2</sub>O<sub>3</sub>(<inline-formula><math display="inline"><semantics><mrow><mn mathvariant="bold">11</mn><mover accent="true"><mn mathvariant="bold">2</mn><mo stretchy="false">¯</mo></mover><mn mathvariant="bold">0</mn></mrow></semantics></math></inline-formula>) Single-Crystal Substrates by Pulsed Laser DepositionManuel G. Pinedo-Cuba0José M. Caicedo-Roque1Jessica Padilla-Pantoja2Justiniano Quispe-Marcatoma3Carlos V. Landauro4Víctor A. Peña-Rodríguez5José Santiso6Facultad de Ciencias Físicas, Universidad Nacional Mayor de San Marcos, Lima 15081, PeruCatalan Institute of Nanoscience and Nanotechnology (ICN2), CSIC and BIST, Campus UAB, Bellaterra, 08193 Barcelona, SpainCatalan Institute of Nanoscience and Nanotechnology (ICN2), CSIC and BIST, Campus UAB, Bellaterra, 08193 Barcelona, SpainFacultad de Ciencias Físicas, Universidad Nacional Mayor de San Marcos, Lima 15081, PeruFacultad de Ciencias Físicas, Universidad Nacional Mayor de San Marcos, Lima 15081, PeruFacultad de Ciencias Físicas, Universidad Nacional Mayor de San Marcos, Lima 15081, PeruCatalan Institute of Nanoscience and Nanotechnology (ICN2), CSIC and BIST, Campus UAB, Bellaterra, 08193 Barcelona, SpainMagnetic shape memory alloys have attracted considerable attention due to their multifunctional properties. Among these materials, Ni-Mn-Ga alloys are distinguished by their ability to achieve up to 10% strain when exposed to a magnetic field, a characteristic predominantly observed in single-crystal samples. Consequently, it is essential to develop nanomaterials with a crystal structure closely resembling that of a single crystal. In this study, an epitaxial Ni-Mn-Ga thin film was fabricated using Pulsed Laser Deposition on an Al<sub>2</sub>O<sub>3</sub> <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mo>(</mo><mn>11</mn><mover accent="true"><mn>2</mn><mo stretchy="false">¯</mo></mover><mn>0</mn><mo>)</mo></mrow></semantics></math></inline-formula> single-crystal substrate. The crystal structure was characterised through X-ray diffraction methodologies, such as symmetrical <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mn>2</mn><mi>θ</mi><mo>−</mo><mi>ω</mi></mrow></semantics></math></inline-formula> scans, pole figures, and reciprocal space maps. The results indicated that the sample was mainly in a slightly distorted cubic austenite phase, and some incipient martensite phase also appeared. A detailed microstructural analysis, performed by transmission electron microscopy, confirmed that certain regions of the sample exhibited an incipient transformation to the martensite phase. Regions closer to the substrate retained the austenite phase, suggesting that the constraint imposed by the substrate inhibits the phase transition. These results indicate that it is possible to grow high crystalline quality thin films of Ni-Mn-Ga by Pulsed Laser Deposition.https://www.mdpi.com/2571-9637/8/2/35magnetic shape memory alloysNi-Mn-Ga alloyspulsed laser depositionepitaxial thin film |
| spellingShingle | Manuel G. Pinedo-Cuba José M. Caicedo-Roque Jessica Padilla-Pantoja Justiniano Quispe-Marcatoma Carlos V. Landauro Víctor A. Peña-Rodríguez José Santiso Epitaxial Growth of Ni-Mn-Ga on Al<sub>2</sub>O<sub>3</sub>(<inline-formula><math display="inline"><semantics><mrow><mn mathvariant="bold">11</mn><mover accent="true"><mn mathvariant="bold">2</mn><mo stretchy="false">¯</mo></mover><mn mathvariant="bold">0</mn></mrow></semantics></math></inline-formula>) Single-Crystal Substrates by Pulsed Laser Deposition Surfaces magnetic shape memory alloys Ni-Mn-Ga alloys pulsed laser deposition epitaxial thin film |
| title | Epitaxial Growth of Ni-Mn-Ga on Al<sub>2</sub>O<sub>3</sub>(<inline-formula><math display="inline"><semantics><mrow><mn mathvariant="bold">11</mn><mover accent="true"><mn mathvariant="bold">2</mn><mo stretchy="false">¯</mo></mover><mn mathvariant="bold">0</mn></mrow></semantics></math></inline-formula>) Single-Crystal Substrates by Pulsed Laser Deposition |
| title_full | Epitaxial Growth of Ni-Mn-Ga on Al<sub>2</sub>O<sub>3</sub>(<inline-formula><math display="inline"><semantics><mrow><mn mathvariant="bold">11</mn><mover accent="true"><mn mathvariant="bold">2</mn><mo stretchy="false">¯</mo></mover><mn mathvariant="bold">0</mn></mrow></semantics></math></inline-formula>) Single-Crystal Substrates by Pulsed Laser Deposition |
| title_fullStr | Epitaxial Growth of Ni-Mn-Ga on Al<sub>2</sub>O<sub>3</sub>(<inline-formula><math display="inline"><semantics><mrow><mn mathvariant="bold">11</mn><mover accent="true"><mn mathvariant="bold">2</mn><mo stretchy="false">¯</mo></mover><mn mathvariant="bold">0</mn></mrow></semantics></math></inline-formula>) Single-Crystal Substrates by Pulsed Laser Deposition |
| title_full_unstemmed | Epitaxial Growth of Ni-Mn-Ga on Al<sub>2</sub>O<sub>3</sub>(<inline-formula><math display="inline"><semantics><mrow><mn mathvariant="bold">11</mn><mover accent="true"><mn mathvariant="bold">2</mn><mo stretchy="false">¯</mo></mover><mn mathvariant="bold">0</mn></mrow></semantics></math></inline-formula>) Single-Crystal Substrates by Pulsed Laser Deposition |
| title_short | Epitaxial Growth of Ni-Mn-Ga on Al<sub>2</sub>O<sub>3</sub>(<inline-formula><math display="inline"><semantics><mrow><mn mathvariant="bold">11</mn><mover accent="true"><mn mathvariant="bold">2</mn><mo stretchy="false">¯</mo></mover><mn mathvariant="bold">0</mn></mrow></semantics></math></inline-formula>) Single-Crystal Substrates by Pulsed Laser Deposition |
| title_sort | epitaxial growth of ni mn ga on al sub 2 sub o sub 3 sub inline formula math display inline semantics mrow mn mathvariant bold 11 mn mover accent true mn mathvariant bold 2 mn mo stretchy false ¯ mo mover mn mathvariant bold 0 mn mrow semantics math inline formula single crystal substrates by pulsed laser deposition |
| topic | magnetic shape memory alloys Ni-Mn-Ga alloys pulsed laser deposition epitaxial thin film |
| url | https://www.mdpi.com/2571-9637/8/2/35 |
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