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Showing 1 to 16 of 16 for “"Spin Ice"”.
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Magnetotransport of connected artificial spin ice
Artificial spin ices are mesoscopic arrays of interacting single-domain ferromagnetic nanoislands or nanowires. With Ising-like behavior of individual magnetic moments, artificial spin ice has been utilized to investigate geometrically frustrated systems like spin ice, a class of magnetic …
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Ground states in artificial spin ice
Artificial spin ice is a class of arrays of interacting ferromagnetic nanoislands that are used to experimentally model Ising spin systems. It has been successfully used to understand the behavior of frustrated spin systems, particularly the class of magnetic pyrochlore oxides known as spin ice. …
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Magnetic reversal of artificial spin ice
Artificial spin ice refers to an array of elongated ferromagnetic elements, providing a fascinating model system to study novel magnetic behavior induced by frustration. Initially used as a tool to understand the behavior of the frustrated spin systems called spin ice, artificial spin ice has …
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Study of thermal kinetics in artificial spin ice systems
Artificial spin ice is a two-dimensional array of nanomagnets fabricated to study geometric frustration, a phenomenon that arises when competing interactions cannot be simultaneously satisfied within the system. While the ground states of these artificial systems have been previously studied, this …
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Pyrochlore spin ice Dy2Ti2O7: Investigating a platform for magnetic monopolar quasiparticles
"Spin ice is a frustrated magnetic state exhibiting a residual entropy in the magnetic degrees of freedom down to the lowest experimentally measured temperatures. The pyrochlore oxide dysprosium titanate (Dy2Ti2O7) supports a spin ice state on its tetrahedral sublattice of dysprosium spins at low …
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Thermal activation, long-range ordering, and topological frustration of artificial spin ice
… rich phenomena and novel physics. Artificial spin ices (ASIs), arrays of lithographically patterned Ising-like single-domain magnetic nanostructures, are highly tunable systems that have proven to be a novel method for studying the effects of frustration and associated properties. The strength …
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Frustration from Frustration: Field Tuning, Vison Crystallisation, and Disorder in Quantum Spin Ice
Quantum spin ice (QSI) is one of the oldest and most widely known models of a U(1) quantum spin liquid – a fascinating phase of matter in which quantum electrodynamics emerges at low energies in a frustrated magnet. This playground for alternate-universe electromagnetism exhibits many phenomena …
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Dynamics of frustrated magnetic systems – Emergent fractals and anomalous magnetic noise in spin ice
… of a topological frustrated magnetic system: spin ice. Spin ice is one of the most thoroughly researched frustrated models, exhibiting exciting phenomena typical of topological matter – including an emergent gauge field description with fractionalised excitations that take the form of emergent …
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Geometric frustration in high spin orbit coupling magnetic materials
… of frustrated materials. The ferrimagnetic spinel $\mathrm{CoV_2O_4}$ has been a topic of recent interest, both as a frustrated insulator with unquenched orbital degeneracy and as a near-itinerant magnet which can be driven metallic with moderate applied pressure. Here, we report on our …
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Exotic phenomena in rare-earth based geometrically frustrated magnets
… are of specific interest due to the strong spin-orbit coupling and crystal electric field effects, which split the degenerate 4f angular momentum states, often leading to an effective spin-1/2 doublet with anisotropic effective exchange models. For this reason, RE materials are paramount to …
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Doping Studies of Frustrated Magnets
… is one of the simplest quasi-one dimensional spin-1/2 magnets which can be modelled with ferromagnetic(FM) nearest neighbour and antiferromagnetic (AFM) next nearest neighbour interactions. Here, doping with both non-magnetic ions, Zn, Mg, and magnetic ions, Co, is investigated. LiCu1-xMxSbO4 …
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Nonzero temperatures and emergent disorder in spin liquids
At absolute zero temperature, spin liquids are known to exhibit a fascinating array of phenomena including topological order, emergent gauge fields, and the existence of exotic quasiparticles with fractional statistics. Meanwhile, at temperatures that are high compared to all characteristic …
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Mocking quantum mechanics: Semiclassical and machine-learning approaches to frustrated magnetism
… two such strategies in the context of quantum spin liquids. In these materials, competition between incompatible interactions results in robust, massive entanglement, down to zero temperature. Such ground states give rise to a range of exotic behaviour, such as topological order and …
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Propiedades magnéticas de nanoestructuras fabricadas sobre áreas grandes mediante procesos de autoorganización y litografía por haz de electrones
… de almacenamiento de la información, o la espintrónica. El control de sus propiedades ha promovido su nanoestructuración, centrándose inicialmente en materiales con una fuerte componente perpendicular. Cuando esta componente es de menor magnitud se habla de PMA débil: la componente …
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Controlling the emergent microstructures in template-directed eutectic solidification for optical applications
… as non-reciprocal metasurfaces, magnetic spin-ice systems, and micro- and nano-lattices with enhanced mechanical properties. Further in Chapter 6 it was shown that for thin layers of eutectic, the pillars act as obstacles that drastically modify the lamellar spacing, which lead to the …
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Exotic Phenomena Emerging from Localized Multipolar Degrees of Freedom
… effect, where conduction electrons equipped with spin and orbital degrees of freedom scatter off a quantum impurity that hosts electric quadrupolar and magnetic octupolar moments. Using renormalization group methods, we uncover a number of stable non-Fermi liquid ground states. We next examine the …