Quantum spin dynamics in single-molecule magnets

by Andrea Morello

Publisher: s.n.] in [S.l

Written in English
Cover of: Quantum spin dynamics in single-molecule magnets | Andrea Morello
Published: Pages: 137 Downloads: 508
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Edition Notes

StatementAndrea Morello
Classifications
LC ClassificationsQC793.3.S6
The Physical Object
PaginationIII, 137 p.
Number of Pages137
ID Numbers
Open LibraryOL27084156M
ISBN 109077595201
ISBN 109789077595206
OCLC/WorldCa66605002

  Magnetic dipole interactions are dominate in quasi one‐dimensional (1D) molecular magnetic materials, in which TbNcPc units (Tb 3+ =terbium(III) ion, Nc 2− =naphthalocyaninato, Pc 2− =phthalocyaninato) adopt a structure similar to TbPc 2 single‐molecule magnets (SMMs). The magnetic properties of the [TbNcPc] 0/+ (neutral 1 Cited by: Over the past fifteen years or so, the study of f-element single-ion magnets (f-SIMs) has gone from being a sub-discipline of molecular magnetism to an established field of research in its own major driving force has been their exceptional promise in applications such as ultra-high-density data storage, spintronics, and quantum information processing (QIP).Cited by: Get this from a library! Spin dynamics: basics of nuclear magnetic resonance. [Malcolm H Levitt] -- NMR spectroscopy is one of the most important and widely used techniques for the identification of compounds. Based on an established course this core text offers a truly modern and updated approach. Influence of the superconducting transition. Serrano and colleagues in Roberta Sessoli’s group at the University of Florence have now found that this interaction also works in the opposite sense: a material undergoing a superconducting transition can influence the spin dynamics of nearby single-molecule magnets. In their experiments, the researchers studied clusters of four iron .

Spin Dynamics: Basics of Nuclear Magnetic Resonance, Second Edition is a comprehensive and modern introduction which focuses on those essential principles and concepts needed for a thorough understanding of the subject, rather than the practical aspects. The quantum theory of nuclear magnets is presented within a strong physical framework, supported by figures.3/5(1). Quantum mechanical effects such as quantum tunneling of magnetization (QTM) and quantum phase interference have been intensively studied in single molecule magnets (SMMs). These materials have also been suggested as candidates for qubits and are promising for molecular spintronics. Understanding decoherence and energy relaxation mechanisms in SMMs is then . In quantum mechanics and particle physics, spin is an intrinsic form of angular momentum carried by elementary particles, composite particles (hadrons), and atomic nuclei. Spin is one of two types of angular momentum in quantum mechanics, the other being orbital angular momentum. These quantities are fed into the master equations that govern the spin dynamics. These can be solved numerically, thus providing a full quantitative analysis of the underlying spin-phonon dynamics. The researchers demonstrate their framework on a real single-molecule magnet, namely [(tpa Ph)Fe]-, an S=2 system. Using ORCA, spin Hamiltonian and.

  The book is written by experts in the field and is intended as a compilation of critical reviews of new areas rather than a comprehensive text. Sample Chapter(s) Chapter 1: Supramolecular Polymetallic 2D[N x N] Transitionmetal Grids — Approaches to Ordered Molecular Assemblies and Functional Molecular Devices (3, KB). Project: Quantum dynamics of spins in molecular magnets Justin focuses on the study of quantum dynamics of spin in single-molecule magnets at temperatures down to 50mK. See more on these topics. played by the spins of the spin-network state. Thus, the spin-network representation is the “non-linear Fock representation for quantum gravity” and this motivates to call the quantum theory we obtain “Quantum Spin Dynamics (QSD)” in analogy with QED or . Magnetic molecules with magnetic bistability have represented the ideal workbench for the investigation of quantum effects in the magnetization dynamics and are now studied at the single molecule level thanks to scanning probe techniques and synchrotron experiments.

Quantum spin dynamics in single-molecule magnets by Andrea Morello Download PDF EPUB FB2

A superconducting transition is used to switch a single molecule magnet from a blocked magnetization state to a resonant quantum tunnelling regime Skip to main content Thank you for visiting Author: Giulia Serrano, Lorenzo Poggini, Matteo Briganti, Matteo Briganti, Andrea Luigi Sorrentino, Giuseppe.

Spin Dynamics: Basics of Nuclear Magnetic Resonance, Second Edition is a comprehensive and modern introduction which focuses on those essential principles and concepts needed for a thorough understanding of the subject, rather than the practical aspects.

The quantum theory of nuclear magnets is presented within a Quantum spin dynamics in single-molecule magnets book physical framework, supported by by: This thesis contains a thorough investigation of the quantum spin dynamics in Mnac and Mn6 Single-molecule magnets. In particular, we have investigated the interplay between quantum tunneling of magnetization and nuclear spin dynamics in Mnac by ultra-low temperature NMR experiments.

We show that the nuclear spin dynamics in the single-molecule magnet Mnac below 1 K is governed by quantum tunneling fluctuations of the cluster spins, combined with intercluster nuclear spin Author: Andrea Morello. Abstract: This thesis contains a thorough investigation of the quantum spin dynamics in Mnac and Mn6 Single-molecule magnets.

In particular, we have investigated the interplay between quantum tunneling of magnetization and nuclear spin dynamics in Mnac by ultra-low temperature NMR by: 3. This thesis sheds new light on the worldwide first electrical manipulation of a single nuclear spin.

Over the last four decades, the size of a bit, the smallest logical unit in a computer, has decreased by more than two orders of magnitude and will soon reach a limit where quantum Brand: Springer International Publishing.

Spin Dynamics: Basics of Nuclear Magnetic Resonance, Second Edition is a comprehensive and modern introduction which focuses on those essential principles and concepts needed for a thorough understanding of the subject, rather than the practical aspects.

Quantum dynamics in Single-Molecule Magnets Wolfgang Wernsdorfer Laboratoire de Magnétisme Louis Néel C.N.R.S. - Grenoble S = 6to 10 S = 1/2 to ≈ Magnetic quantum system - spin - molecule - nanoparticle - spin chain. Single-molecule magnets (SMM) Mn 12 S = 10 Fe 8 S = 10 V 15 S = 1/2 Ni 12 S = 12 Giant spins Mn Quantum dynamics of exchange biased Single Molecule Magnets W.

Wernsdorfer N. Aliaga-Alcalde R. Tiron D. Hendrickson G. Christou Lab. Louis Néel, CNRS, BPGrenoble Cedex 9, France Dept. of Chemistry, University of Florida, Gainesville, Florida Dept. of Chemistry and Biochemistry, University of California at San Diego.

Spin Dynamics: Basics of Nuclear Magnetic Resonance, Second Edition is a comprehensive and modern introduction which focuses on those essential principles and concepts needed for a thorough understanding of the subject, rather than the practical aspects.

The quantum theory of nuclear magnets is presented within a strong physical framework, supported by figures/5(28). Managing this effect is key for spintronics in the quantum limit.

Magnetic fields can modify state mixing and, for example, mitigate destabilizing effects in single-molecule magnets 1,2. The exchange bias field 3,4 has been proposed as a mechanism for localized control of individual nanomagnets 5, by: Spin Dynamics: Basics of Nuclear Magnetic Resonance.

Spin Dynamics: Basics of Nuclear Magnetic Resonance, Second Edition is a comprehensive and modern introduction which focuses on those essential principles and concepts needed for a thorough understanding of the subject, rather than the practical aspects. Magnets are widely used in a large number of applications, and their market is larger than that of semiconductors.

Information storage is certainly one of the most important uses of magnets, and the lower limit to the size of the memory elements is provided by the superparamagnetic size, below which information cannot be permanently stored because the Cited by: Quantum Molecular Magnets.

Quantum molecular magnetism involves the design and study of magnetic molecules, including paramagnetic molecules known as single-molecule magnets (SMMs) and one-dimensional chains of molecules called single-chain magnets (SCMs), which exhibit slow paramagnetic relaxation and hysteresis.

Nanoscale magnets show new promise as quantum information processors Together with collaborators at the Universities of Manchester and Princeton, we have moved a step closer to making a new kind of information processing device called a quantum computer by using tiny magnets, each one made out of a single molecule.

The detailed theoretical understanding of quantum spin dynamics in various molecular magnets is an important step on the roadway to technological applications of these systems. Quantum effects in both ferromagnetic and antiferromagnetic molecular clusters are, by now, theoretically well by:   Abstract.

We show that the nuclear spin dynamics in the single-molecule magnet Mn ac below 1K is governed by quantum tunneling fluctuations of the cluster spins, combined with intercluster nuclear spin also obtain the first experimental proof that—surprisingly—even deep in the quantum regime the nuclear spins remain in good Cited by: We show that the nuclear spin dynamics in the single-molecule magnet Mnac below 1 K is governed by quantum tunneling fluctuations of the cluster spins, combined with intercluster nuclear spin Author: Eric J L Mcinnes.

Single-Molecule Magnets (SMMs) are transition metal or lanthanide-based systems characterized by a large magnetic moment whose dynamics is governed by magnetic anisotropy which creates a double well energy potential.

1 Through a rational chemical design, anisotropy barriers exceeding a thousand Kelvin have been obtained and blocking of the magnetization observed. Single-molecule magnets (SMMs), stand out for their appeal to the research on the foundations of quantum physics as well as promising applications.SMMs are metal-organic clusters made of a magnetic core surrounded by an organic ligand shell.

They are neutral entities that form molecular crystals bound by weak Van der Waals by: 1. Control of spin–lattice magnetic relaxation is crucial to observe long quantum coherence in spin systems at reasonable temperatures.

Such a control is most often extremely difficult to achieve, because of the coexistence of several relaxation mechanisms, that is direct, Raman, and Orbach.

These are not always easy to relate to the energy states of the investigated system, because Cited by: Abstract. This thesis contains a thorough investigation of the quantum spin dynamics in Mnac and Mn6 Single-molecule magnets. In particular, we have investigated the interplay between quantum tunneling of magnetization and nuclear spin dynamics in Mnac by ultra-low temperature NMR : Andrea Morello.

1: Nuclear 2: The NMR NMR r-Transform 3: Nuclear Spin of Quantum r Spin Systems in Isotropic LiquidsPart 4: Uncouples-1/ Spin-1/le of Spins-1/ments on Non.

Spin dynamics in nanomagnets: Quantum Spin Dynamics in Molecular Nanomagnets I. Introduction - Quantum Tunneling of Magnetization - Initial Discoveries - Single molecule magnets. This reference work on Spin in Organics contains four volumes dedicated to spin injection, spin transport, spin pumping, organic magnetic field effect, and molecular spintronics.

The field of Organic Spintronics has accelerated and matured in the last dozen years with the realization of an organic spin-valve (in ) and magneto-resistance and. Controlling the dynamics of spins on surfaces is pivotal to the design of spintronic and quantum computing devices.

Proposed schemes involve the interaction of spins with graphene to enable surface-state spintronics, and electrical by: Spin Dynamics: Basics of Nuclear Magnetic Resonance, Second Edition is a comprehensive and modern introduction which focuses on those essential principles and concepts needed for a thorough understanding of the subject, rather than the practical aspects.

The quantum theory of nuclear magnets is presented within a strong physical framework, supported by figures. Spin dynamics in single-molecule magnets combining surface acoustic waves and high-frequency electron paramagnetic resonance dates for quantum computers and high-density information storage devices.1,2 Before any technological applications can be implemented, however, one must have knowledge of the.

The results of our calculation indicated the possibility for the control of the phase relaxation by the change of the structure in spin clusters. Possible implications of our results are related to the single-molecule magnets, ESR-STM detection of spins, and related spin-transition phenomena (decoherence and population relaxation).

Quantum mechanical MRI simulations: solving the matrix dimension problem. A.J. Allami, M.G. Concilio, P. Lally, I. Kuprov, Science Advances, 5 () eaaw We propose a solution to the matrix dimension problem in quantum mechanical simulations of MRI (magnetic resonance imaging) experiments on complex molecules.

Quantum spin dynamics with pairwise-tunable, long-range interactions. Here, we propose and analyze a physical platform for simulating long-range quantum magnetism in which full control is achieved for the spin-exchange coefficient between a pair of spins at arbitrary distances in 1D and 2D lattices.

The enabling platform, as described in by: The symmetry of single-molecule magnets dictates their spin quantum dynamics, influencing how such systems relax via quantum tunneling of magnetization (QTM).

By reducing a system's symmetry, through the application of a magnetic field or uniaxial pressure, these dynamics .Baek, Seung-Ho, "Spin dynamics and quantum tunneling in Fe8 nanomagnet and in AFM rings by NMR " ().Retrospective Theses (MM) i.e., single molecule magnets (SMMs) are excellent zero-dimensional model system for model system for the study of the quantum spin dynamics of one-dimensional antiferromag­ Author: Seung-Ho Baek.