Direct entropy determination and application to artificial spin ice
نویسندگان
چکیده
منابع مشابه
Direct observation of the ice rule in an artificial kagome spin ice
Recently, significant interest has emerged in fabricated systems that mimic the behavior of geometrically frustrated materials. We present the full realization of such an artificial spin ice system on a two-dimensional kagome lattice and we demonstrate rigid adherence to the local ice rule by directly counting individual pseudospins. The resulting spin configurations show not only local ice rul...
متن کاملDirect observation of the ice rule in demagnetized artificial kagome spin ice
Submitted for the MAR08 Meeting of The American Physical Society Direct observation of the ice rule in demagnetized artificial kagome spin ice YI QI, TODD BRINTLINGER, JOHN CUMINGS, Materials Science and Engineering, University of Maryland, College Park, PAULA MELLADO, OLEG TCHERNYSHYOV, Johns Hopkins University — Artificially designed magnetic structures have proven to be good analogs for the ...
متن کاملTopological frustration of artificial spin ice
Frustrated systems, typically characterized by competing interactions that cannot all be simultaneously satisfied, display rich behaviours not found elsewhere in nature. Artificial spin ice takes a materials-by-design approach to studying frustration, where lithographically patterned bar magnets mimic the frustrated interactions in real materials but are also amenable to direct characterization...
متن کاملEmerging chirality in artificial spin ice.
Artificial spin ice, made up of planar nanostructured arrays of simple ferromagnetic bars, is a playground for rich physics associated with the spin alignment of the bars and spin texture associated with the magnetic frustration at the bar vertices. The phase diagram is exotic, showing magnetic monopole-like defects and liquid and solid phases of spins arranged in loop states with predicted chi...
متن کاملNonmonotonic zero-point entropy in diluted spin ice.
Water ice and spin ice are important model systems in which theory can directly account for "zero-point" entropy associated with quenched configurational disorder. Spin ice differs from water ice in the important respect that its fundamental constituents, the spins of the magnetic ions, can be removed through replacement with nonmagnetic ions while keeping the lattice structure intact. In order...
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ژورنال
عنوان ژورنال: Nature Physics
سال: 2010
ISSN: 1745-2473,1745-2481
DOI: 10.1038/nphys1728