Experimental and theoretical evidences for the ice regime in planar artificial spin ices
In this work, we explore a kind of geometrical effect in the thermodynamics of artificial spin ices (ASI). In general, such artificial materials are athermal. Here, We demonstrate that geometrically driven dynamics in ASI can open up the panorama of exploring distinct ground states and thermally mag...
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| creator | Loreto, R P Nascimento, F S Gonçalves, R S Borme, J Cezar, J C Nisoli, C Pereira, A R C I L de Araujo |
| description | In this work, we explore a kind of geometrical effect in the thermodynamics of artificial spin ices (ASI). In general, such artificial materials are athermal. Here, We demonstrate that geometrically driven dynamics in ASI can open up the panorama of exploring distinct ground states and thermally magnetic monopole excitations. It is shown that a particular ASI lattice will provide a richer thermodynamics with nanomagnet spins experiencing less restriction to flip precisely in a kind of rhombic lattice. This can be observed by analysis of only three types of rectangular artificial spin ices (RASI). Denoting the horizontal and vertical lattice spacings by a and b, respectively, then, a RASI material can be described by its aspect ratio \(\gamma\)=a/b. The rhombic lattice emerges when \(\gamma\)=\(\sqrt{3}\). So, by comparing the impact of thermal effects on the spin flips in these three appropriate different RASI arrays, it is possible to find a system very close to the ice regime. |
| doi_str_mv | 10.48550/arxiv.1710.03058 |
| format | Article |
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| subjects | Aspect ratio Magnetic monopoles Physics - Materials Science Temperature effects Thermodynamics |
| title | Experimental and theoretical evidences for the ice regime in planar artificial spin ices |
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