Direct imaging of coexisting ordered and frustrated sublattices in artificial ferromagnetic quasicrystals
- Univ. of Kentucky, Lexington, KY (United States)
- National Institute of Standards and Technology, Gaithersburg, MD (United States); Univ. of Maryland, College Park, MD (United States)
- National Institute of Standards and Technology, Gaithersburg, MD (United States)
- Argonne National Lab. (ANL), Argonne, IL (United States)
Here, we have used scanning electron microscopy with polarization analysis and photoemission electron microscopy to image the two-dimensional magnetization of permalloy films patterned into Penrose P2 tilings (P2T). The interplay of exchange interactions in asymmetrically coordinated vertices and short-range dipole interactions among connected film segments stabilize magnetically ordered, spatially distinct sublattices that coexist with frustrated sublattices at room temperature. Numerical simulations that include long-range dipole interactions between sublattices agree with images of as-grown P2T samples and predict a magnetically ordered ground state for a two-dimensional quasicrystal lattice of classical Ising spins.
- Research Organization:
- Argonne National Laboratory (ANL), Argonne, IL (United States)
- Sponsoring Organization:
- Argonne National Laboratory - Advanced Photon Source; National Science Foundation (NSF); National Institute of Standards and Technology (NIST) - Center for Nanoscale Science and Technology (CNST); USDOE
- Grant/Contract Number:
- AC02-06CH11357; FG02-97ER45653
- OSTI ID:
- 1350531
- Alternate ID(s):
- OSTI ID: 1249728
- Journal Information:
- Physical Review B, Vol. 93, Issue 13; ISSN 2469-9950
- Publisher:
- American Physical Society (APS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
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Angular Dependent Magnetization Dynamics with Mirror-symmetric Excitations in Artificial Quasicrystalline Nanomagnet Lattices | text | January 2018 |
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