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Showing 1 to 20 of 49 for “"exchange coupling"”.
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Interlayer exchange coupling in magnetic multilayers
The discovery of the exchange coupling between ferromagnetic layers separated by nonmagnetic spacer layers has stimulated a great deal of interest recently. We present a theoretical study of the interlayer coupling in magnetic multilayers using two theoretical approaches. One such approach is to …
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Exchange coupling and giant magnetoresistance in nickel-iron/copper multilayers
In recent years interlayer exchange coupling and giant magnetoresistance (GMR) in transition metal ferromagnet/nonmagnetic multilayers have been extensively studied. Bilinear interlayer exchange favors the collinear alignment of the magnetization of adjacent ferromagnetic layers, oscillates with …
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Green function studies of the interlayer exchange coupling in magnetic multilayers
The Interlayer Exchange Coupling (IEC) of magnetic multilayers has been one of the most studied problems in condensed matter physics for the last decade. It is found that for a multilayer structure in which magnetic layers are separated by a spacer, the magnetic moments of each layer orient …
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Studies of the Optical Properties of Solids: I. Two-Photon Electroabsorption. Ii. Electron-Hole Exchange Coupling at L(ii,iii) Edges
Made available in DSpace on 2015-05-13T15:22:11Z (GMT). No. of bitstreams: 2 license.txt: 4848 bytes, checksum: 96035ab3f5e1c23cc7138a224ce498bd (MD5) 7811257.PDF: 4043940 bytes, checksum: b20d8efbc87445f7b5e2bca6f9697a32 (MD5) Previous issue date: 1978
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Exploration of Alkyne-bridged Multi[(Porphinato)metal] Oligomers for Charge Transport Applications and Spin-Spin Exchange Coupling Properties Using Synthetic, Spectroscopic, Potentiometric, and Magnetic Resonance Methods
… the charge transport and spin-spin electronic coupling properties of an extraordinary class of molecular wires, alkyne-bridged porphyrin arrays. Chapter one provides a general background of molecular electronics and molecular wires, as well as the basics of electron paramagnetic resonance …
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Micomagnetic calculations of the magnetic properties of thin metallic films
… includes Zeeman, anisotropy, magnetostatic and exchange. The magnetostatic energy is incorporated by considering each grain as a point dipole and its a magnitude was obtained in collaboration with J.J. Miles. The exchange coupling is incorporated by utilising the phenomenological expression …
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Quantum Computation With Electron Spins of Phosphorous Donors in Silicon
… quantum gate operations with only the Heisenberg exchange coupling J S1 •S2 between neighboring donors. Therefore, studying the exchange coupling for a phosphorous donor pair in silicon is of central importance for providing the experimentalists with qualitative insights and quantitative guidance …
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Spin-sensitive probes of triplet excitons in organic semiconductors
… we describe the first observation of strongly exchange coupled, high-spin triplet-pair states ($S=2$) in a solid-state organic semiconductor and show that the singlet fission process allows for the formation of long-lived, strongly coupled spin-two states. We then describe the development and …
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Electron Transport via Single Molecule Magnets with Magnetic Anisotropy
… spin filtering effects, strong spin-phonon coupling and strong hyperfine Stark effects. These effects allow applications of SMMs to high-density information storage, molecular spintronics, and quantum information science. Therefore, SMMs are of interest to physicists, chemists, and …
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Three-dimensional modelling of metal evaporated tape
… model demonstrated that as the strength of the exchange coupling parameter increased, then moments which were strongly coupled resisted large negative fields and square hysteresis loops with a high coercivity were produced. Reversal of the moments was observed to be initiated at the ends of a …
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Complex Phase Behavior of Exotic Oxides: Optical Spectroscopy Studies
… which we could estimate the in-plane spin-spin exchange coupling constant J∥. Importantly, we found that Ca3Ru2O7 does not exhibit strong in-plane magnetic correlations above TN.
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Aspects of Dzyaloshinskii-Moriya Interaction in Two Dimensional Magnetic Structures
… Kasuya-Yosida (RKKY) type indirect exchange coupling between two magnetic moments at nite temperature using the free electron band. At high temperature, the coupling strength decays with distance faster than the coupling at zero temperature but the period of oscillation remains same. …
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Interplay of Spin and Photophysics in Luminescent Open-Shell Molecular Semiconductors
… state. This is achieved by engineering strong exchange coupling between resonant radical and triplet manifolds in covalently linked structures. The resulting high-spin states are coherently addressable with microwaves even at 295 K, with optical read-out enabled by intersystem crossing to the …
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A study of surface roughness issues in magnetic tunnel junctions
… that the tunneling magnetoresistance and the exchange coupling are greatly modified by introducing the interface roughness into the basic Ferromagnet/Insulator/Ferromagnet structure. Experimentally, the surface roughness of the Ni80Fe20 bottom electrode is controlled by applying an rf …
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Transport properties of quantum dot molecules and electronic structure of graphene quantum dot qubits
… boundary conditions. We then evaluate the exchange splitting based on an unrestricted Hartree-Fock method for the Dirac particles. The electronic wave function and long-range exchange coupling due to the Klein tunneling and the Coulomb interaction are calculated for various gate …
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Tunable High-Field/ High-Frequency ESR and High-Field Magnetization on Single-Molecule Clusters
… to 52\,T allowed determination of the magnetic exchange coupling parameters, and to probing the effective spin of the ground state. The main focus was on tunable high-field/high-frequency (tHF) ESR in static fields < 17 T and pulse field ESR up to 36 T. This magnetic resonance method has been …
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Effects of AG on structural and magnetic properties of FePt thin films
… with Ag, FePt grain size and magnetic exchange coupling were reduced with increasing Ag content. A study on alloying of FePt-Ag indicated that most Ag atoms formed a separate phase from FePt. The coercivity enhancement was associated with the pinning effect of Ag and improvement in …
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THE STUDY OF PERPENDICULARLY MAGNETIZED COFE/PD MULTILAYERS FOR DOMAIN WALL MOTION
… are observed, which can be attributed to the exchange coupling torque (ECT) generated in the SAF structure.
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Micromagnetic Study of Composite Media for High Density Heat Assisted Magnetic Recording
… recording (SMR) technology. The interlayer exchange coupling effects are found to affect the energy barrier during the dynamic recording process. Both the thermal effects and write temperature can be tuned by optimizing the interlayer exchange coupling effects. Further research verified that …
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Nanostructured magnetic materials for integrated magnonic devices
… characterization, and application of advanced exchange spring (ES)/exchange coupled (EC) nanoheterostructures and their magnetic properties. Current challenges in the field of magnetics include the development of materials that demonstrate tunable magnetic properties, particularly in terms of …
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