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Han Y, Ruan Y, Xue M, Wu Y, Shi M, Song Z, Zhou Y, Teng J. Effect of Annealing Time on the Cyclic Characteristics of Ceramic Oxide Thin Film Thermocouples. MICROMACHINES 2022; 13:1970. [PMID: 36422398 PMCID: PMC9694502 DOI: 10.3390/mi13111970] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/19/2022] [Revised: 10/31/2022] [Accepted: 11/11/2022] [Indexed: 06/16/2023]
Abstract
Oxide thin film thermocouples (TFTCs) are widely used in high-temperature environment measurements and have the advantages of good stability and high thermoelectric voltage. However, different annealing processes affect the performance of TFTCs. This paper studied the impact of different annealing times on the cyclic characteristics of ceramic oxide thin film thermocouples. ITO/In2O3 TFTCs were prepared on alumina ceramics by a screen printing method, and the samples were annealed at different times. The microstructure of the ITO film was studied by scanning electron microscopy (SEM), X-ray diffraction (XRD), and X-ray photoelectron spectroscopy (XPS). The results show that when the annealing temperature is fixed, the stability of the thermocouple is worst when it is annealed for 2 h. Extending the annealing time can improve the properties of the film, increase the density, slow down oxidation, and enhance the thermal stability of the thermocouple. The thermal cycle test results show that the sample can reach five temperature rise and fall cycles, more than 50 h, and can meet the needs of stable measurement in high temperature and harsh environments.
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Affiliation(s)
- Yuning Han
- Department of Electronic Information, Beijing Information Science and Technology University, Beijing 100192, China
| | - Yong Ruan
- Department of Precision Instruments, Tsinghua University, Beijing 100084, China
| | - Meixia Xue
- Department of Materials Physics and Chemistry, University of Science and Technology Beijing, Beijing 100083, China
| | - Yu Wu
- Department of Precision Instruments, Tsinghua University, Beijing 100084, China
- Qiyuan Laboratory, Beijing 100094, China
| | - Meng Shi
- MEMS Institute of Zibo National High-Tech Industrial Development Zone, Zibo 255000, China
| | - Zhiqiang Song
- MEMS Institute of Zibo National High-Tech Industrial Development Zone, Zibo 255000, China
| | - Yuankai Zhou
- MEMS Institute of Zibo National High-Tech Industrial Development Zone, Zibo 255000, China
| | - Jiao Teng
- Department of Materials Physics and Chemistry, University of Science and Technology Beijing, Beijing 100083, China
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Swekis P, Sukhanov AS, Chen YC, Gloskovskii A, Fecher GH, Panagiotopoulos I, Sichelschmidt J, Ukleev V, Devishvili A, Vorobiev A, Inosov DS, Goennenwein STB, Felser C, Markou A. Magnetic and Electronic Properties of Weyl Semimetal Co 2MnGa Thin Films. NANOMATERIALS (BASEL, SWITZERLAND) 2021; 11:251. [PMID: 33477868 PMCID: PMC7832844 DOI: 10.3390/nano11010251] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/21/2020] [Revised: 01/12/2021] [Accepted: 01/14/2021] [Indexed: 11/18/2022]
Abstract
Magnetic Weyl semimetals are newly discovered quantum materials with the potential for use in spintronic applications. Of particular interest is the cubic Heusler compound Co2MnGa due to its inherent magnetic and topological properties. This work presents the structural, magnetic and electronic properties of magnetron co-sputtered Co2MnGa thin films, with thicknesses ranging from 10 to 80 nm. Polarized neutron reflectometry confirmed a uniform magnetization through the films. Hard x-ray photoelectron spectroscopy revealed a high degree of spin polarization and localized (itinerant) character of the Mn d (Co d) valence electrons and accompanying magnetic moments. Further, broadband and field orientation-dependent ferromagnetic resonance measurements indicated a relation between the thickness-dependent structural and magnetic properties. The increase of the tensile strain-induced tetragonal distortion in the thinner films was reflected in an increase of the cubic anisotropy term and a decrease of the perpendicular uniaxial term. The lattice distortion led to a reduction of the Gilbert damping parameter and the thickness-dependent film quality affected the inhomogeneous linewidth broadening. These experimental findings will enrich the understanding of the electronic and magnetic properties of magnetic Weyl semimetal thin films.
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Affiliation(s)
- Peter Swekis
- Max Planck Institute for Chemical Physics of Solids, Nöthnitzer Str. 40, 01187 Dresden, Germany; (P.S.); (A.S.S.); (Y.-C.C.); (G.H.F.); (J.S.); (C.F.)
- Institut für Festkörper- und Materialphysik, Technische Universität Dresden, 01062 Dresden, Germany; (D.S.I.); (S.T.B.G.)
| | - Aleksandr S. Sukhanov
- Max Planck Institute for Chemical Physics of Solids, Nöthnitzer Str. 40, 01187 Dresden, Germany; (P.S.); (A.S.S.); (Y.-C.C.); (G.H.F.); (J.S.); (C.F.)
- Institut für Festkörper- und Materialphysik, Technische Universität Dresden, 01062 Dresden, Germany; (D.S.I.); (S.T.B.G.)
| | - Yi-Cheng Chen
- Max Planck Institute for Chemical Physics of Solids, Nöthnitzer Str. 40, 01187 Dresden, Germany; (P.S.); (A.S.S.); (Y.-C.C.); (G.H.F.); (J.S.); (C.F.)
- Department of Materials Science and Engineering, National Chiao Tung University, Hsinchu 30010, Taiwan
| | | | - Gerhard H. Fecher
- Max Planck Institute for Chemical Physics of Solids, Nöthnitzer Str. 40, 01187 Dresden, Germany; (P.S.); (A.S.S.); (Y.-C.C.); (G.H.F.); (J.S.); (C.F.)
| | - Ioannis Panagiotopoulos
- Department of Materials Science and Engineering, University of Ioannina, 45110 Ioannina, Greece;
| | - Jörg Sichelschmidt
- Max Planck Institute for Chemical Physics of Solids, Nöthnitzer Str. 40, 01187 Dresden, Germany; (P.S.); (A.S.S.); (Y.-C.C.); (G.H.F.); (J.S.); (C.F.)
| | - Victor Ukleev
- Laboratory for Neutron Scattering and Imaging, Paul Scherrer Institute, 5232 Villigen, Switzerland;
| | - Anton Devishvili
- Institut Laue Langevin, 38000 Grenoble, France;
- Department of Physics and Astronomy, Uppsala University, 75120 Uppsala, Sweden;
| | - Alexei Vorobiev
- Department of Physics and Astronomy, Uppsala University, 75120 Uppsala, Sweden;
| | - Dmytro S. Inosov
- Institut für Festkörper- und Materialphysik, Technische Universität Dresden, 01062 Dresden, Germany; (D.S.I.); (S.T.B.G.)
| | - Sebastian T. B. Goennenwein
- Institut für Festkörper- und Materialphysik, Technische Universität Dresden, 01062 Dresden, Germany; (D.S.I.); (S.T.B.G.)
- Center for Transport and Devices of Emergent Materials, Technische Universität Dresden, 01062 Dresden, Germany
- Department of Physics, University of Konstanz, 78457 Konstanz, Germany
| | - Claudia Felser
- Max Planck Institute for Chemical Physics of Solids, Nöthnitzer Str. 40, 01187 Dresden, Germany; (P.S.); (A.S.S.); (Y.-C.C.); (G.H.F.); (J.S.); (C.F.)
| | - Anastasios Markou
- Max Planck Institute for Chemical Physics of Solids, Nöthnitzer Str. 40, 01187 Dresden, Germany; (P.S.); (A.S.S.); (Y.-C.C.); (G.H.F.); (J.S.); (C.F.)
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Abstract
This Special Issue contains a series of reviews and papers representing some recent results and some exciting perspectives focused on advanced strategies in thin films growth, thin films engineering by magnetron sputtering and related techniques. Innovative fundamental and applied research studies are then reported, emphasizing correlations between structuration process parameters, new ideas and approaches for thin films engineering and resulting properties of as-deposited coatings.
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Moein T, Gailevičius D, Katkus T, Ng SH, Lundgaard S, Moss DJ, Kurt H, Mizeikis V, Staliūnas K, Malinauskas M, Juodkazis S. Optically-Thin Broadband Graphene-Membrane Photodetector. NANOMATERIALS 2020; 10:nano10030407. [PMID: 32106560 PMCID: PMC7152839 DOI: 10.3390/nano10030407] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/20/2019] [Revised: 02/14/2020] [Accepted: 02/18/2020] [Indexed: 11/25/2022]
Abstract
A broadband graphene-on-Si3N4-membrane photodetector for the visible-IR spectral range is realised by simple lithography and deposition techniques. Photo-current is produced upon illumination due to presence of the build-in potential between dissimilar metal electrodes on graphene as a result of charge transfer. The sensitivity of the photo-detector is ∼1.1 μA/W when irradiated with 515 and 1030 nm wavelengths; a smaller separation between the metal contacts favors gradient formation of the built-in electric field and increases the efficiency of charge separation. This optically-thin graphene-on-membrane photodetector and its interdigitated counterpart has the potential to be used within 3D optical elements, such as photonic crystals, sensors, and wearable electronics applications where there is a need to minimise optical losses introduced by the detector.
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Affiliation(s)
- Tania Moein
- Optical Sciences Centre, Swinburne University of Technology, John St., Hawthorn, VIC 3122, Australia; (T.K.); (S.J.)
- The ARC Training Centre in Surface Engineering for Advanced Materials (SEAM), School of Science, Swinburne University of Technology, Hawthorn, VIC 3122, Australia
- Correspondence: (T.M.); (D.G.)
| | - Darius Gailevičius
- Laser Research Center, Faculty of Physics, Vilnius University, Saulėtekio Ave. 10, LT-10223 Vilnius, Lithuania
- Correspondence: (T.M.); (D.G.)
| | - Tomas Katkus
- Optical Sciences Centre, Swinburne University of Technology, John St., Hawthorn, VIC 3122, Australia; (T.K.); (S.J.)
- The ARC Training Centre in Surface Engineering for Advanced Materials (SEAM), School of Science, Swinburne University of Technology, Hawthorn, VIC 3122, Australia
| | - Soon Hock Ng
- Optical Sciences Centre, Swinburne University of Technology, John St., Hawthorn, VIC 3122, Australia; (T.K.); (S.J.)
- The ARC Training Centre in Surface Engineering for Advanced Materials (SEAM), School of Science, Swinburne University of Technology, Hawthorn, VIC 3122, Australia
| | - Stefan Lundgaard
- Optical Sciences Centre, Swinburne University of Technology, John St., Hawthorn, VIC 3122, Australia; (T.K.); (S.J.)
- The ARC Training Centre in Surface Engineering for Advanced Materials (SEAM), School of Science, Swinburne University of Technology, Hawthorn, VIC 3122, Australia
| | - David J. Moss
- Optical Sciences Centre, Swinburne University of Technology, John St., Hawthorn, VIC 3122, Australia; (T.K.); (S.J.)
| | - Hamza Kurt
- Department of Electrical and Electronics Engineering, TOBB University of Economics and Technology, Ankara 06560, Turkey
| | - Vygantas Mizeikis
- Research Institute of Electronics, Shizuoka University, 3-5-1 Johoku, Naka-ku, Hamamatsu 432-8561, Japan
| | - Kȩstutis Staliūnas
- Dep. de Física, Universitat Politècnica de Catalunya (UPC), Colom 11, E-08222 Terrassa, Spain
- Institució Catalana de Recerca i Estudis Avançats (ICREA), Passeig Lluís Companys 23, E-08010 Barcelona, Spain
| | - Mangirdas Malinauskas
- Laser Research Center, Faculty of Physics, Vilnius University, Saulėtekio Ave. 10, LT-10223 Vilnius, Lithuania
- Tokyo Tech World Research Hub Initiative (WRHI), School of Materials and Chemical Technology, Tokyo Institute of Technology, 2-12-1, Ookayama, Meguro-ku, Tokyo 152-8550, Japan
| | - Saulius Juodkazis
- Optical Sciences Centre, Swinburne University of Technology, John St., Hawthorn, VIC 3122, Australia; (T.K.); (S.J.)
- The ARC Training Centre in Surface Engineering for Advanced Materials (SEAM), School of Science, Swinburne University of Technology, Hawthorn, VIC 3122, Australia
- Tokyo Tech World Research Hub Initiative (WRHI), School of Materials and Chemical Technology, Tokyo Institute of Technology, 2-12-1, Ookayama, Meguro-ku, Tokyo 152-8550, Japan
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