Magnetism and spintronics in graphene oxide

Ray, Sekhar C.

doi:10.1016/b978-0-12-817680-1.00006-8

Cited by 2 publications

(1 citation statement)

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“…In this context, graphene oxide (GO) and reduced graphene oxide (RGO) open the doorway toward magnetic graphene. The multilayer structure opens the band gap and increases the spin–orbit coupling in the sheets, making them magnetically active. − Apart from that, the oxygen functionalities and defects bring profound magnetism to the sheets and make them a suitable platform for loading magnetic nanoparticles. When combined with α-Fe 2 O 3 NPs, GO and RGO form inhomogeneous nanocomposites, offering a more efficient functional interface and a combination of strong spin–orbit coupling (SOC) with robust magnetism. , Reduction routes also play a crucial role in determining the properties of RGO sheets.…”

Section: Introductionmentioning

confidence: 99%

Magnetism and Raman Investigations of Hydrothermally Reduced Graphene Oxide-Incorporated α-Fe₂O₃ Nanocomposites: The Role of Temperature-Dependent Charge Transfer-Induced Interfacial Interactions

2022

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RGO-incorporated α-Fe 2 O 3 nanocomposites are in the spotlight for their outstanding performance in a variety of fields, spanning from energy storage to biomedicine. Thus, understanding the temperature-dependent spin dynamics and phonon signatures of such magnetic graphene nanocomposites is crucial for optimizing the synthesis according to the demands. This study investigates the unique magnetism and intriguing interfacial effects in hydrothermally reduced graphene oxide-incorporated hematite nanoparticles (α-Fe 2 O 3 /PRGO) using DC magnetization and temperature-dependent Raman measurements, complemented with XRD, SEM, and XPS analysis. The interfacial p z -d hybridization plays a key role in stabilizing such inhomogeneous nanocomposites by bringing long-range strain energy and enhancing both spin−phonon and electron−phonon couplings. M(H) and M(T) curves speak about various magnetic interactions and anisotropies as a function of temperature and field. The Morin transition temperature is around 183 K, and the magnetic transition range is 150−230 K. Additionally, both peak positions and respective line widths of metal oxide phonon peaks experience anomalies in the same Morin transition temperature range. We believe that this is because of the interfacial Dzyaloshinskii−Moriya interaction emerging due to PRGO wrapping onto α-Fe 2 O 3 nanoparticles. The weakly linear nature of G and D bands with temperature variation is discussed considering the literature. Herein, we have outlined a phenomenological model of the temperature-dependent charge transfer effect at the interface, which can explain the experimental findings. According to the model, the Anderson localization of free electrons cannot lead to better charge sharing at low temperatures; however, it becomes active above 100 K due to a balanced spin−charge−lattice coupling and persists up to room temperature, after which thermally induced disorders further limit the interfacial process. In particular, these correlated magnetic and Raman investigations unveil the details of the underlying physical processes of such nanocomposites and explore the system's viability for spintronics, electronics, and biomedical applications.

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Section: Introductionmentioning

confidence: 99%

Magnetism and Raman Investigations of Hydrothermally Reduced Graphene Oxide-Incorporated α-Fe₂O₃ Nanocomposites: The Role of Temperature-Dependent Charge Transfer-Induced Interfacial Interactions

2022

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Comparation of electrochemical and photosensitivity of silver (Ag) and graphene oxide (GOx) thin film for blood glucose monitoring

Maulida,

Maharani,

Basyari

et al. 2023

AIP Conference Proceedings

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Magnetism and spintronics in graphene oxide

Cited by 2 publications

References 101 publications

Magnetism and Raman Investigations of Hydrothermally Reduced Graphene Oxide-Incorporated α-Fe₂O₃ Nanocomposites: The Role of Temperature-Dependent Charge Transfer-Induced Interfacial Interactions

Magnetism and Raman Investigations of Hydrothermally Reduced Graphene Oxide-Incorporated α-Fe₂O₃ Nanocomposites: The Role of Temperature-Dependent Charge Transfer-Induced Interfacial Interactions

Comparation of electrochemical and photosensitivity of silver (Ag) and graphene oxide (GOx) thin film for blood glucose monitoring

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Magnetism and spintronics in graphene oxide

Cited by 2 publications

References 101 publications

Magnetism and Raman Investigations of Hydrothermally Reduced Graphene Oxide-Incorporated α-Fe2O3 Nanocomposites: The Role of Temperature-Dependent Charge Transfer-Induced Interfacial Interactions

Magnetism and Raman Investigations of Hydrothermally Reduced Graphene Oxide-Incorporated α-Fe2O3 Nanocomposites: The Role of Temperature-Dependent Charge Transfer-Induced Interfacial Interactions

Comparation of electrochemical and photosensitivity of silver (Ag) and graphene oxide (GOx) thin film for blood glucose monitoring

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Magnetism and Raman Investigations of Hydrothermally Reduced Graphene Oxide-Incorporated α-Fe₂O₃ Nanocomposites: The Role of Temperature-Dependent Charge Transfer-Induced Interfacial Interactions

Magnetism and Raman Investigations of Hydrothermally Reduced Graphene Oxide-Incorporated α-Fe₂O₃ Nanocomposites: The Role of Temperature-Dependent Charge Transfer-Induced Interfacial Interactions