Magnetic Ni‐Nanoinclusions in VO2 Thin Films for Broad Tuning of Phase Transition Properties
Abstract Mott insulator VO2 exhibits an ultrafast and reversible semiconductor‐to‐metal transition (SMT) near 340 K (67 °C). In order to fulfill the multifunctional device applications, effective transition temperature (Tc) tuning as well as integrated functionality in VO2 is desired. In this study,...
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| Format: | Article |
| Language: | English |
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Wiley-VCH
2023-12-01
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| Series: | Advanced Physics Research |
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| Online Access: | https://doi.org/10.1002/apxr.202300031 |
| _version_ | 1797384683008294912 |
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| author | Zihao He Jie Jian Lizabeth Quigley Nirali A. Bhatt James P. Barnard Claire A. Mihalko Haohan Wang Xin Li Phuah Juanjuan Lu Xiaoshan Xu Haiyan Wang |
| author_facet | Zihao He Jie Jian Lizabeth Quigley Nirali A. Bhatt James P. Barnard Claire A. Mihalko Haohan Wang Xin Li Phuah Juanjuan Lu Xiaoshan Xu Haiyan Wang |
| author_sort | Zihao He |
| collection | DOAJ |
| description | Abstract Mott insulator VO2 exhibits an ultrafast and reversible semiconductor‐to‐metal transition (SMT) near 340 K (67 °C). In order to fulfill the multifunctional device applications, effective transition temperature (Tc) tuning as well as integrated functionality in VO2 is desired. In this study, multifunctionalities including tailorable SMT characteristics, ferromagnetic (FM) integration, and magneto‐optical (MO) coupling, have been demonstrated via metal/VO2 nanocomposite designs with controlled morphology, i.e., a two‐phase Ni/VO2 pillar‐in‐matrix geometry and a three‐phase Au/Ni/VO2 particle‐in‐matrix geometry. Evident Tc reduction of 20.4 to 54.9 K has been achieved by morphology engineering. Interestingly, the Au/Ni/VO2 film achieves a record‐low Tc of 295.2 K (22.2 °C), slightly below room temperature (25 °C). The change in film morphology is also correlated with unique property tuning. Highly anisotropic magnetic and optical properties have been demonstrated in Ni/VO2 film, whereas Au/Ni/VO2 film exhibits isotropic properties because of the uniform distribution of Au/Ni nanoparticles. Furthermore, a strong MO coupling with enhanced magnetic coercivity and anisotropy is demonstrated for both films, indicating great potential for optically active property tuning. This demonstration opens exciting opportunities for the VO2‐based device implementation towards smart windows, next‐generation optical‐coupled switches, and spintronic devices. |
| first_indexed | 2024-03-08T21:40:12Z |
| format | Article |
| id | doaj.art-80cee1912e024d3cb67aa54ad078c124 |
| institution | Directory Open Access Journal |
| issn | 2751-1200 |
| language | English |
| last_indexed | 2024-03-08T21:40:12Z |
| publishDate | 2023-12-01 |
| publisher | Wiley-VCH |
| record_format | Article |
| series | Advanced Physics Research |
| spelling | doaj.art-80cee1912e024d3cb67aa54ad078c1242023-12-20T14:05:16ZengWiley-VCHAdvanced Physics Research2751-12002023-12-01212n/an/a10.1002/apxr.202300031Magnetic Ni‐Nanoinclusions in VO2 Thin Films for Broad Tuning of Phase Transition PropertiesZihao He0Jie Jian1Lizabeth Quigley2Nirali A. Bhatt3James P. Barnard4Claire A. Mihalko5Haohan Wang6Xin Li Phuah7Juanjuan Lu8Xiaoshan Xu9Haiyan Wang10School of Electrical and Computer Engineering Purdue University West Lafayette IN 47907 USASchool of Materials Engineering Purdue University West Lafayette IN 47907 USASchool of Materials Engineering Purdue University West Lafayette IN 47907 USASchool of Materials Engineering Purdue University West Lafayette IN 47907 USASchool of Materials Engineering Purdue University West Lafayette IN 47907 USASchool of Materials Engineering Purdue University West Lafayette IN 47907 USADepartment of Physics and Astronomy University of Nebraska–Lincoln Lincoln NE 68588 USASchool of Materials Engineering Purdue University West Lafayette IN 47907 USASchool of Materials Engineering Purdue University West Lafayette IN 47907 USADepartment of Physics and Astronomy University of Nebraska–Lincoln Lincoln NE 68588 USASchool of Electrical and Computer Engineering Purdue University West Lafayette IN 47907 USAAbstract Mott insulator VO2 exhibits an ultrafast and reversible semiconductor‐to‐metal transition (SMT) near 340 K (67 °C). In order to fulfill the multifunctional device applications, effective transition temperature (Tc) tuning as well as integrated functionality in VO2 is desired. In this study, multifunctionalities including tailorable SMT characteristics, ferromagnetic (FM) integration, and magneto‐optical (MO) coupling, have been demonstrated via metal/VO2 nanocomposite designs with controlled morphology, i.e., a two‐phase Ni/VO2 pillar‐in‐matrix geometry and a three‐phase Au/Ni/VO2 particle‐in‐matrix geometry. Evident Tc reduction of 20.4 to 54.9 K has been achieved by morphology engineering. Interestingly, the Au/Ni/VO2 film achieves a record‐low Tc of 295.2 K (22.2 °C), slightly below room temperature (25 °C). The change in film morphology is also correlated with unique property tuning. Highly anisotropic magnetic and optical properties have been demonstrated in Ni/VO2 film, whereas Au/Ni/VO2 film exhibits isotropic properties because of the uniform distribution of Au/Ni nanoparticles. Furthermore, a strong MO coupling with enhanced magnetic coercivity and anisotropy is demonstrated for both films, indicating great potential for optically active property tuning. This demonstration opens exciting opportunities for the VO2‐based device implementation towards smart windows, next‐generation optical‐coupled switches, and spintronic devices.https://doi.org/10.1002/apxr.202300031VO2magnetic propertiesoptical propertiestransition temperature |
| spellingShingle | Zihao He Jie Jian Lizabeth Quigley Nirali A. Bhatt James P. Barnard Claire A. Mihalko Haohan Wang Xin Li Phuah Juanjuan Lu Xiaoshan Xu Haiyan Wang Magnetic Ni‐Nanoinclusions in VO2 Thin Films for Broad Tuning of Phase Transition Properties Advanced Physics Research VO2 magnetic properties optical properties transition temperature |
| title | Magnetic Ni‐Nanoinclusions in VO2 Thin Films for Broad Tuning of Phase Transition Properties |
| title_full | Magnetic Ni‐Nanoinclusions in VO2 Thin Films for Broad Tuning of Phase Transition Properties |
| title_fullStr | Magnetic Ni‐Nanoinclusions in VO2 Thin Films for Broad Tuning of Phase Transition Properties |
| title_full_unstemmed | Magnetic Ni‐Nanoinclusions in VO2 Thin Films for Broad Tuning of Phase Transition Properties |
| title_short | Magnetic Ni‐Nanoinclusions in VO2 Thin Films for Broad Tuning of Phase Transition Properties |
| title_sort | magnetic ni nanoinclusions in vo2 thin films for broad tuning of phase transition properties |
| topic | VO2 magnetic properties optical properties transition temperature |
| url | https://doi.org/10.1002/apxr.202300031 |
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