Spin ice (nonfiction): Difference between revisions
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[[File:Spin_ice_spin_arrangement_diagram.svg|thumb|The arrangement of spins (black arrows) in a spin ice.]]A '''spin ice''' is a substance that does not have a single minimal-energy state. | [[File:Spin_ice_spin_arrangement_diagram.svg|thumb|The arrangement of spins (black arrows) in a spin ice.]]A '''spin ice''' is a substance that does not have a single minimal-energy state. | ||
It has "spin" degrees of freedom, i.e., it is a magnet, with frustrated interactions that prevent it from completely freezing. | It has "spin" degrees of freedom, i.e., it is a magnet, with frustrated interactions that prevent it from completely freezing. | ||
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Recent experiments have found evidence for the existence of deconfined magnetic monopoles in these materials, with analogous properties to the hypothetical magnetic monopoles postulated to exist in the vacuum. | Recent experiments have found evidence for the existence of deconfined magnetic monopoles in these materials, with analogous properties to the hypothetical magnetic monopoles postulated to exist in the vacuum. | ||
== | == In the News == | ||
<gallery mode="traditional"> | <gallery mode="traditional"> | ||
File:Nobel Ice (Fabergé egg).jpg|Fabergé egg made from [[Spin ice (nonfiction)|Spin Ice]] is relic of [[Dysprosium Titanate]] age, warn [[Gem detective (nonfiction)|Gem detectives]]. | |||
File:Gnotilus-fighting-Heracles.jpg|link=Gnotilus|[[Gnotilus]] has an unlucky habit of slipping and falling on spin ice. | File:Gnotilus-fighting-Heracles.jpg|link=Gnotilus|[[Gnotilus]] has an unlucky habit of slipping and falling on spin ice. | ||
Brion_Gysin.jpg|Brion Gysion uses newly-discovered [[scrying engine]] to preview [[Gnotilus]] slipping on spin ice. | Brion_Gysin.jpg|Brion Gysion uses newly-discovered [[scrying engine]] to preview [[Gnotilus]] slipping on spin ice. | ||
</gallery> | </gallery> | ||
== External links | == Fiction cross-reference == | ||
* [[Dysprosium Titanate]] | |||
* [[Gnotilus]] | |||
* [[Scrying engine]] | |||
== Nonfiction cross-reference == | |||
* [[Dysprosium titanate (nonfiction)]] | |||
* [[Gem detective (nonfiction)]] | |||
* [[Geometrical frustration (nonfiction)]] | |||
External links: | |||
* [http://wiki.karljones.com/index.php?title=Spin_ice Spin ice] @ wiki.karljones.com | * [http://wiki.karljones.com/index.php?title=Spin_ice Spin ice] @ wiki.karljones.com | ||
Revision as of 07:04, 16 June 2016
A spin ice is a substance that does not have a single minimal-energy state.
It has "spin" degrees of freedom, i.e., it is a magnet, with frustrated interactions that prevent it from completely freezing.
Spin ices show low-temperature properties, residual entropy in particular, closely related to those of crystalline water ice.
The most prominent compounds with such properties are dysprosium titanate (nonfiction) and holmium titanate.
The magnetic ordering of a spin ice resembles the positional ordering of hydrogen atoms in conventional water ice.
Recent experiments have found evidence for the existence of deconfined magnetic monopoles in these materials, with analogous properties to the hypothetical magnetic monopoles postulated to exist in the vacuum.
In the News
Fabergé egg made from Spin Ice is relic of Dysprosium Titanate age, warn Gem detectives.
Gnotilus has an unlucky habit of slipping and falling on spin ice.
Brion Gysion uses newly-discovered scrying engine to preview Gnotilus slipping on spin ice.
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Fiction cross-reference
Nonfiction cross-reference
External links: