Measurement of the charge and current of magnetic monopoles in spin ice

  title={Measurement of the charge and current of magnetic monopoles in spin ice},
  author={Steven T Bramwell and Sean R. Giblin and Stuart Calder and Robert J. Aldus and Dharmalingam Prabhakaran and T. Fennell},
The transport of electrically charged quasiparticles (based on electrons or ions) plays a pivotal role in modern technology as well as in determining the essential functions of biological organisms. In contrast, the transport of magnetic charges has barely been explored experimentally, mainly because magnetic charges, in contrast to electric ones, are generally considered at best to be convenient macroscopic parameters, rather than well-defined quasiparticles. However, it was recently proposed… 

Creation and measurement of long-lived magnetic monopole currents in spin ice

The recent discovery of ‘magnetricity’ in spin ice raises the question of whether long-lived currents of magnetic ‘monopoles’ can be created and manipulated by applying magnetic fields. Here we show

Electrodynamics in cylindrical symmetry in the magnetic plasma state

Excited states in magnetic structures of the so-called spin-ices and in some artificial magnetic materials present a behaviour as being a magnetic neutral plasma. In this state the electromagnetic

Magnetic monopole dynamics in spin ice.

The diffusive quasi-particle dynamics of real spin ice materials within the 'quantum tunnelling' regime is modelled with Metropolis dynamics, with the particles constrained to move along an underlying network of oriented paths, which are classical analogues of the Dirac strings connecting pairs of Dirac monopoles.

Magnetic Monopole Current in Artificial Square Spin Ice

Recent theoretical and experimental results have revealed the existence of magnetic monopoles, in the form of quasi particles, in both condensed matter known as spin ice, as well as in

Analysis of electromagnetic propagation in the magnetic plasma state in spin-ice systems

Low energy excitation states in magnetic structures of the so-called spin-ices are produced via spin flips among contiguous tetrahedrons of their crystal structure. When there are sufficient free

The Wien Effect in Electric and Magnetic Coulomb systems - from Electrolytes to Spin Ice

A Coulomb gas or fluid comprises charged particles that interact via the Coulomb interaction. Examples of a Coulombic systems include simple and complex electrolytes together with magnetic monopoles

1 Magnetic Monopole Noise

Magnetic monopoles 1 3 are hypothetical elementary particles exhibiting quantized magnetic charge !" = ±(h μ"e) and quantized magnetic flux +" = ±h/e . A classic proposal for detecting such magnetic

Decomposition CO₂ and CO in Flow of Gases by Means of Technical Ferrogravitational Field

The author's experimental studies shown that magnetic poles (magnetic charges) are real structural components of atoms and substance.   It is the magnetic poles, and not the electrons moving are

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Magnetic monopoles are hypothetical elementary particles exhibiting quantized magnetic charge m0 = ±(h/(μ0e)) and quantized magnetic flux Φ0 = ±h/e. In principle, such a magnetic charge can be

Direct observation of magnetic monopole freedom in two-dimensional artificial spin ice

Magnetic monopole unpairing as a function of external magnetic fields is presented as a fingerprint of this emergent quasiparticles freedom in a two-dimensional artificial spin ice system. Such freedom,



Magnetic monopoles in spin ice

This work proposes that magnetic monopoles emerge in a class of exotic magnets known collectively as spin ice: the dipole moment of the underlying electronic degrees of freedom fractionalises into monopoles, which would account for a mysterious phase transition observed experimentally in spin ice in a magnetic field.

Monopole and Dirac string Dynamics in Spin Ice

Magnetic monopoles have eluded experimental detection since their prediction nearly a century ago by Dirac. Recently it has been shown that classical analogues of these enigmatic particles occur as

Dirac Strings and Magnetic Monopoles in the Spin Ice Dy2Ti2O7

Magnetic Monopoles Magnets come with a north and a south pole. Despite being predicted to exist, searches in astronomy and in high-energy particle physics experiments for magnetic monopoles (either

Observation of Magnetic Monopoles in Spin Ice

Excitations from a strongly frustrated system, the kagome ice state of the spin ice Dy 2 Ti 2 O 7 under magnetic fields along a [111] direction, have been studied. They are theoretically proposed to

μSR investigation of spin dynamics in the spin-ice material Dy2Ti2O7

We present a detailed muon spin relaxation (μ+SR) study of the spin-ice material Dy2Ti2O7. Polycrystalline samples of this material have been studied in the temperature range 0.02 K<T<300 K in

Self-dissociation and protonic charge transport in water and

  • M. EigenL. de Maeyer
  • Chemistry
    Proceedings of the Royal Society of London. Series A. Mathematical and Physical Sciences
  • 1958
A comprehensive survey on experimental techniques, results and theoretical interpretations concerning the self-dissociation and protonic charge transport in water and ice is given. Recent

Magnetic Coulomb Phase in the Spin Ice Ho2Ti2O7.

Every magnet has two poles, north, and south. If we cut a bar magnet in half and wind up with two magnets, each has its own North and South Pole. But physicists have long speculated that unattached

Magnetic relaxation in rare-earth oxide pyrochlores

A theory of magnetic relaxation is developed for geometrically frustrated three-dimensional magnets that can be described by an antiferromagnetic Ising model. These magnetic materials are exemplified

Spin Ice State in Frustrated Magnetic Pyrochlore Materials

The essential physics of spin ice, as it is currently understood, is described and new avenues for future research on related materials and models are identified.

Artificial ‘spin ice’ in a geometrically frustrated lattice of nanoscale ferromagnetic islands

This work reports an artificial geometrically frustrated magnet based on an array of lithographically fabricated single-domain ferromagnetic islands, arranged such that the dipole interactions create a two-dimensional analogue to spin ice, behaviour which is strikingly similar to the low-temperature state of spin ice.