Effects of W Doping in VO2 on the Magnetic Properties of VO2/Ni Heterostructures

Sutton, Logan; Blehm, A.; Lauzier, J.; Malone, K.; Smith, G.B.; Singh, Meenakshi; Venta, J. de la

doi:10.1007/s10948-020-05504-3

Cited by 4 publications

(5 citation statements)

References 39 publications

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“…[26,44] The effect of metallic doping (e.g., Ni/W-doped VO 2 ) on the Ni/VO 2 morphology was also discussed. [45] In addition, the Ni/VO 2 nanoflower structure demonstrated a potential application in Li-S batteries with a strong adsorption acceleration effect. [46] However, a systematic study on the SMT characteristics tuning via FM phase integration is lacking, which is potentially favorable for room temperature VO 2 -based electronic and photonic applications.…”

Section: Resultsmentioning

confidence: 99%

Magnetic Ni‐Nanoinclusions in VO₂ Thin Films for Broad Tuning of Phase Transition Properties

He,

Jian,

Quigley

et al. 2023

Advanced Physics Research

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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.

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Section: Resultsmentioning

confidence: 99%

Magnetic Ni‐Nanoinclusions in VO₂ Thin Films for Broad Tuning of Phase Transition Properties

He,

Jian,

Quigley

et al. 2023

Advanced Physics Research

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“…In thin film form, the FE and AF order parameters of multiferroics could be affected for the phenomenon of magnetostriction [1]- [4] due to the change in the dimensions of the material as a consequence of stresses generated at the contact interface, either with the substrate or with another material. To study this mechanism of coupling at the interface with BFO, the vanadium dioxide (VO2) system was used, which has been widely analyzed due to the structural change it undergoes from VO2 (monoclinic) to VO2 (tetragonal) at a temperature of 340 K, showing weak ferromagnetic behavior [6], [7]. The combination of these materials in heterostructures gives access to the study of mixed properties and their control.…”

Section: Introductionmentioning

confidence: 99%

“…Good compatibility might therefore be expected in the bilayer system based on BFO and VO2 since the interface effects are predominant and detectable in analogous materials [8]. de la Venta et al, [6], [7], [9], [10] showed the change in the coercivity of thin films of nickel deposited on V2O3 and VO2, a change attributed to the structural phase transition of V2O3 and VO2. Saerbeck et al, [11] studied and compiled information about the coupling between magnetism and the structural phase transition by interfacial tension in different systems of La0.7A0.3MnO3 (A = Sr,Ca), Fe3O4, CoFe2O4, FeRh, Ni, Fe and Co, using as a base the structural change in the VO2, V2O3 and BaTiO3 compounds, resulting in structures with hybrid properties that manage to modify and/or control the magnetic behavior through effects of tension and inverse magnetostriction.…”

Section: Introductionmentioning

confidence: 99%

Surface and Electrical Characterization of Bilayers Based on BifeO<sub>3 </sub>and VO<sub>2</sub>

Martínez¹,

Mosquera²,

Fuenzalida³

et al. 2022

Preprint

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Thin films of BiFeO3 (BFO), VO2 and BFO/VO2 were grown on SrTiO3(100) and Al2O3(0001) monocrystalline substrates using the RF and DC sputtering techniques. The surface of the films was characterized by profilometry, AFM, and XPS. The heterostructures have roughnesses between 0.2 and 16 nm and a grain size between 20 nm and 67 nm. XPS measurements show a higher proportion of the V4+ and Bi3+ oxides. In the Fe region, a higher proportion of Fe3+ is shown in the films. The homogeneous ordering, low roughnesses, and the oxidation states on the obtained surface show a good coupling in these films. The I-V curves show ohmic behavior at room temperature and change with increasing temperature. The effect of coupling these materials in a thin film shows the appearance of hysteresis cycles I-V and R-T, typical of materials with high potential in applications such as resistive memories and solar cells.

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“…To study this mechanism of coupling at the interface with BFO, the vanadium dioxide (VO 2 ) system was used, which has been widely analyzed due to the structural change it undergoes from VO 2 (monoclinic) to VO 2 (tetragonal) at a temperature of 340 K, showing weak ferromagnetic behavior [ 12 , 13 ]. The combination of these materials in heterostructures gives access to the study of mixed properties and their control.…”

Section: Introductionmentioning

confidence: 99%

“…Good compatibility might, therefore, be expected in the bilayer system based on BFO and VO 2 since the interface effects are predominant and detectable in analogous materials [ 14 ]. De la Venta et al [ 12 , 13 , 15 , 16 ] showed the change in the coercivity of thin films of nickel deposited on V 2 O 3 and VO 2 , a change attributed to the structural phase transition of V 2 O 3 and VO 2 . Saerbeck et al [ 17 ] studied and compiled information about the coupling between magnetism and the structural phase transition by interfacial tension in different systems of La 0 .…”

Section: Introductionmentioning

confidence: 99%

Surface and Electrical Characterization of Bilayers Based on BiFeO3 and VO2

et al. 2022

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Thin films of BiFeO3, VO2, and BiFeO3/VO2 were grown on SrTiO3(100) and Al2O3(0001) monocrystalline substrates using radio frequency and direct current sputtering techniques. To observe the effect of the coupling between these materials, the surface of the films was characterized by profilometry, atomic force microscopy, and X-ray photoelectron spectroscopy. The heterostructures, monolayers, and bilayers based on BiFeO3 and VO2 grew with good adhesion and without delamination or signs of incompatibility between the layers. A good granular arrangement and RMS roughness between 1 and 5 nm for the individual layers (VO2 and BiFeO3) and between 6 and 18 nm for the bilayers (BiFeO3/VO2) were observed. Their grain size is between 20 nm and 26 nm for the individual layers and between 63 nm and 67 nm for the bilayers. X-ray photoelectron spectroscopy measurements show a higher proportion of V4+, Bi3+, and Fe3+ in the films obtained. The homogeneous ordering, low roughness, and oxidation states on the obtained surface show a good coupling in these films. The I-V curves show ohmic behavior at room temperature and change with increasing temperature. The effect of coupling these materials in a thin film shows the appearance of hysteresis cycles, I-V and R-T, which is typical of materials with high potential in applications, such as resistive memories and solar cells.

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Effects of W Doping in VO2 on the Magnetic Properties of VO2/Ni Heterostructures

Cited by 4 publications

References 39 publications

Magnetic Ni‐Nanoinclusions in VO₂ Thin Films for Broad Tuning of Phase Transition Properties

Magnetic Ni‐Nanoinclusions in VO₂ Thin Films for Broad Tuning of Phase Transition Properties

Surface and Electrical Characterization of Bilayers Based on BifeO<sub>3 </sub>and VO<sub>2</sub>

Surface and Electrical Characterization of Bilayers Based on BiFeO3 and VO2

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Effects of W Doping in VO2 on the Magnetic Properties of VO2/Ni Heterostructures

Cited by 4 publications

References 39 publications

Magnetic Ni‐Nanoinclusions in VO2 Thin Films for Broad Tuning of Phase Transition Properties

Magnetic Ni‐Nanoinclusions in VO2 Thin Films for Broad Tuning of Phase Transition Properties

Surface and Electrical Characterization of Bilayers Based on BifeO<sub>3 </sub>and VO<sub>2</sub>

Surface and Electrical Characterization of Bilayers Based on BiFeO3 and VO2

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Magnetic Ni‐Nanoinclusions in VO₂ Thin Films for Broad Tuning of Phase Transition Properties

Magnetic Ni‐Nanoinclusions in VO₂ Thin Films for Broad Tuning of Phase Transition Properties