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Olea de la Hoz F, Saavedra E, Pereira A, Escrig J. Static and Dynamic Magnetic Properties of Fe 3O 4 Nanotubes. NANOMATERIALS (BASEL, SWITZERLAND) 2023; 13:1265. [PMID: 37049358 PMCID: PMC10097039 DOI: 10.3390/nano13071265] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/20/2023] [Revised: 03/22/2023] [Accepted: 03/23/2023] [Indexed: 06/19/2023]
Abstract
In this paper, our objective was to investigate the static and dynamic magnetic properties of Fe3O4 nanotubes that are 1000 nm long, by varying the external radius and the thickness of the tube wall. We performed a detailed numerical analysis by simulating hysteresis curves with an external magnetic field applied parallel to the axis of the tubes (along the z-axis). Our findings indicate that nanotubes with an external radius of 30 nm exhibit non-monotonic behavior in their coercivity due to a change in the magnetization reversal mechanism, which was not observed in nanotubes with external radii of 80 nm. Additionally, we explored the dynamic susceptibility of these nanotubes and found that the position and number of resonance peaks can be controlled by manipulating the nanotube geometry. Overall, our study provides valuable insights into the behavior of Fe3O4 nanotubes, which can aid in the design and improvement in pseudo-one-dimensional technological devices.
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Affiliation(s)
| | - Eduardo Saavedra
- Department of Physics, University of Santiago de Chile (USACH), Santiago 9170124, Chile
| | - Alejandro Pereira
- Department of Sciences, Faculty of Liberal Arts, Adolfo Ibañez University (UAI), Santiago 7941169, Chile
| | - Juan Escrig
- Department of Physics, University of Santiago de Chile (USACH), Santiago 9170124, Chile
- Center for the Development of Nanoscience and Nanotechnology (CEDENNA), Santiago 9170124, Chile
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Yanilkin I, Gumarov A, Golovchanskiy I, Gabbasov B, Yusupov R, Tagirov L. Engineering the Exchange Spin Waves in Graded Thin Ferromagnetic Films. NANOMATERIALS (BASEL, SWITZERLAND) 2022; 12:4361. [PMID: 36558214 PMCID: PMC9785029 DOI: 10.3390/nano12244361] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/07/2022] [Revised: 12/01/2022] [Accepted: 12/05/2022] [Indexed: 06/17/2023]
Abstract
The results of experimental and theoretical studies of standing spin waves in a series of epitaxial films of the ferromagnetic Pd1−xFex alloy (0.02 < x < 0.11) with different distributions of the magnetic properties across the thickness are presented. Films with linear and stepwise, as well as more complex Lorentzian, sine and cosine profiles of iron concentration in the alloy, and thicknesses from 20 to 400 nm are considered. A crucial influence of the magnetic properties profile on the spectrum of spin wave resonances is demonstrated. A capability of engineering the standing spin waves in graded ferromagnetic films for applications in magnonics is discussed.
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Affiliation(s)
- Igor Yanilkin
- Institute of Physics, Kazan Federal University, 420008 Kazan, Russia
- FRC Kazan Scientific Centre of RAS, Zavoisky Physical-Technical Institute, 420029 Kazan, Russia
| | - Amir Gumarov
- Institute of Physics, Kazan Federal University, 420008 Kazan, Russia
- FRC Kazan Scientific Centre of RAS, Zavoisky Physical-Technical Institute, 420029 Kazan, Russia
| | - Igor Golovchanskiy
- National University of Science and Technology MISiS, 119049 Moscow, Russia
- Advanced Mesoscience and Nanotechnology Centre, Moscow Institute of Physics and Technology, 141700 Dolgoprudny, Russia
| | - Bulat Gabbasov
- Institute of Physics, Kazan Federal University, 420008 Kazan, Russia
- FRC Kazan Scientific Centre of RAS, Zavoisky Physical-Technical Institute, 420029 Kazan, Russia
| | - Roman Yusupov
- Institute of Physics, Kazan Federal University, 420008 Kazan, Russia
| | - Lenar Tagirov
- Institute of Physics, Kazan Federal University, 420008 Kazan, Russia
- FRC Kazan Scientific Centre of RAS, Zavoisky Physical-Technical Institute, 420029 Kazan, Russia
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Makarov D, Volkov OM, Kákay A, Pylypovskyi OV, Budinská B, Dobrovolskiy OV. New Dimension in Magnetism and Superconductivity: 3D and Curvilinear Nanoarchitectures. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2022; 34:e2101758. [PMID: 34705309 DOI: 10.1002/adma.202101758] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/04/2021] [Revised: 05/16/2021] [Indexed: 06/13/2023]
Abstract
Traditionally, the primary field, where curvature has been at the heart of research, is the theory of general relativity. In recent studies, however, the impact of curvilinear geometry enters various disciplines, ranging from solid-state physics over soft-matter physics, chemistry, and biology to mathematics, giving rise to a plethora of emerging domains such as curvilinear nematics, curvilinear studies of cell biology, curvilinear semiconductors, superfluidity, optics, 2D van der Waals materials, plasmonics, magnetism, and superconductivity. Here, the state of the art is summarized and prospects for future research in curvilinear solid-state systems exhibiting such fundamental cooperative phenomena as ferromagnetism, antiferromagnetism, and superconductivity are outlined. Highlighting the recent developments and current challenges in theory, fabrication, and characterization of curvilinear micro- and nanostructures, special attention is paid to perspective research directions entailing new physics and to their strong application potential. Overall, the perspective is aimed at crossing the boundaries between the magnetism and superconductivity communities and drawing attention to the conceptual aspects of how extension of structures into the third dimension and curvilinear geometry can modify existing and aid launching novel functionalities. In addition, the perspective should stimulate the development and dissemination of research and development oriented techniques to facilitate rapid transitions from laboratory demonstrations to industry-ready prototypes and eventual products.
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Affiliation(s)
- Denys Makarov
- Helmholtz-Zentrum Dresden - Rossendorf e.V., Institute of Ion Beam Physics and Materials Research, 01328, Dresden, Germany
| | - Oleksii M Volkov
- Helmholtz-Zentrum Dresden - Rossendorf e.V., Institute of Ion Beam Physics and Materials Research, 01328, Dresden, Germany
| | - Attila Kákay
- Helmholtz-Zentrum Dresden - Rossendorf e.V., Institute of Ion Beam Physics and Materials Research, 01328, Dresden, Germany
| | - Oleksandr V Pylypovskyi
- Helmholtz-Zentrum Dresden - Rossendorf e.V., Institute of Ion Beam Physics and Materials Research, 01328, Dresden, Germany
- Kyiv Academic University, Kyiv, 03142, Ukraine
| | - Barbora Budinská
- Superconductivity and Spintronics Laboratory, Nanomagnetism and Magnonics, Faculty of Physics, University of Vienna, Vienna, 1090, Austria
| | - Oleksandr V Dobrovolskiy
- Superconductivity and Spintronics Laboratory, Nanomagnetism and Magnonics, Faculty of Physics, University of Vienna, Vienna, 1090, Austria
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Vovk A, Bunyaev SA, Štrichovanec P, Vovk NR, Postolnyi B, Apolinario A, Pardo JÁ, Algarabel PA, Kakazei GN, Araujo JP. Control of Structural and Magnetic Properties of Polycrystalline Co 2FeGe Films via Deposition and Annealing Temperatures. NANOMATERIALS 2021; 11:nano11051229. [PMID: 34066968 PMCID: PMC8148587 DOI: 10.3390/nano11051229] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/30/2021] [Revised: 04/25/2021] [Accepted: 05/05/2021] [Indexed: 11/16/2022]
Abstract
Thin polycrystalline Co2FeGe films with composition close to stoichiometry have been fabricated using magnetron co-sputtering technique. Effects of substrate temperature (TS) and post-deposition annealing (Ta) on structure, static and dynamic magnetic properties were systematically studied. It is shown that elevated TS (Ta) promote formation of ordered L21 crystal structure. Variation of TS (Ta) allow modification of magnetic properties in a broad range. Saturation magnetization ~920 emu/cm3 and low magnetization damping parameter α ~ 0.004 were achieved for TS = 573 K. This in combination with soft ferromagnetic properties (coercivity below 6 Oe) makes the films attractive candidates for spin-transfer torque and magnonic devices.
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Affiliation(s)
- Andrii Vovk
- Departamento de Física e Astronomia, Institute of Physics for Advanced Materials, Nanotechnology and Photonics (IFIMUP), Universidade do Porto, 4169-007 Porto, Portugal; (S.A.B.); (N.R.V.); (B.P.); (A.A.); (G.N.K.); (J.P.A.)
- Correspondence:
| | - Sergey A. Bunyaev
- Departamento de Física e Astronomia, Institute of Physics for Advanced Materials, Nanotechnology and Photonics (IFIMUP), Universidade do Porto, 4169-007 Porto, Portugal; (S.A.B.); (N.R.V.); (B.P.); (A.A.); (G.N.K.); (J.P.A.)
| | - Pavel Štrichovanec
- Instituto de Nanociencia y Materiales de Aragón, Campus Río Ebro, Universidad de Zaragoza—CSIC, 50018 Zaragoza, Spain; (P.Š.); (J.Á.P.)
| | - Nikolay R. Vovk
- Departamento de Física e Astronomia, Institute of Physics for Advanced Materials, Nanotechnology and Photonics (IFIMUP), Universidade do Porto, 4169-007 Porto, Portugal; (S.A.B.); (N.R.V.); (B.P.); (A.A.); (G.N.K.); (J.P.A.)
| | - Bogdan Postolnyi
- Departamento de Física e Astronomia, Institute of Physics for Advanced Materials, Nanotechnology and Photonics (IFIMUP), Universidade do Porto, 4169-007 Porto, Portugal; (S.A.B.); (N.R.V.); (B.P.); (A.A.); (G.N.K.); (J.P.A.)
- Department of Nanoelectronics and Surface Modification, Sumy State University, 40007 Sumy, Ukraine
| | - Arlete Apolinario
- Departamento de Física e Astronomia, Institute of Physics for Advanced Materials, Nanotechnology and Photonics (IFIMUP), Universidade do Porto, 4169-007 Porto, Portugal; (S.A.B.); (N.R.V.); (B.P.); (A.A.); (G.N.K.); (J.P.A.)
| | - José Ángel Pardo
- Instituto de Nanociencia y Materiales de Aragón, Campus Río Ebro, Universidad de Zaragoza—CSIC, 50018 Zaragoza, Spain; (P.Š.); (J.Á.P.)
- Departamento de Ciencia y Tecnología de Materiales y Fluidos, Universidad de Zaragoza, 50018 Zaragoza, Spain
| | - Pedro Antonio Algarabel
- Instituto de Nanociencia y Materiales de Aragón, Campus San Francisco, Universidad de Zaragoza—CSIC, 50009 Zaragoza, Spain;
- Departamento de Física de la Materia Condensada, Universidad de Zaragoza, 50009 Zaragoza, Spain
| | - Gleb N. Kakazei
- Departamento de Física e Astronomia, Institute of Physics for Advanced Materials, Nanotechnology and Photonics (IFIMUP), Universidade do Porto, 4169-007 Porto, Portugal; (S.A.B.); (N.R.V.); (B.P.); (A.A.); (G.N.K.); (J.P.A.)
| | - João Pedro Araujo
- Departamento de Física e Astronomia, Institute of Physics for Advanced Materials, Nanotechnology and Photonics (IFIMUP), Universidade do Porto, 4169-007 Porto, Portugal; (S.A.B.); (N.R.V.); (B.P.); (A.A.); (G.N.K.); (J.P.A.)
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