Spin ice (nonfiction): Difference between revisions
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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. | ||
== Description o== | == Description o== | ||
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== Fiction cross-reference == | == Fiction cross-reference == | ||
* [[Gnotilus]] - supervillain known for slipping and falling on spin ice | * [[Gnotilus]] - supervillain known for slipping and falling on spin ice. | ||
== External links == | == External links == | ||
Revision as of 14:41, 10 June 2016
A spin ice is a substance that does not have a single minimal-energy state.
Description o
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.
Nonfiction cross-reference
Fiction cross-reference
- Gnotilus - supervillain known for slipping and falling on spin ice.