Spiral spin order of self-assembled Co nanodisk arrays.

Phys Rev Lett

Department of Physics, Beijing Normal University, Beijing 100875, People's Republic of China.

Published: April 2006

AI Article Synopsis

  • The study uses off-axis electron holography to analyze the spin order in rows of hexagonal close packed cobalt nanodisks.
  • It finds that the magnetic flux density varies periodically, indicating a spiral spin arrangement along the rows.
  • This spiral arrangement is due to the magnetic moments of the nanoparticles being tilted relative to the axis of the nanodisks.

Article Abstract

Spin order in hexagonal close packed cobalt nanodisk rows is quantitatively determined by off-axis electron holography. Periodic variation in the density of the local magnetic flux shows features of a spiral spin arrangement along the row axis, resulting from a tilted magnetic moment of nanoparticles with respect to the nanodisk axis.

Download full-text PDF

Source
http://dx.doi.org/10.1103/PhysRevLett.96.137205DOI Listing

Publication Analysis

Top Keywords

spiral spin
8
spin order
8
order self-assembled
4
self-assembled nanodisk
4
nanodisk arrays
4
arrays spin
4
order hexagonal
4
hexagonal close
4
close packed
4
packed cobalt
4

Similar Publications

The coherent spin waves, magnons, can propagate without accompanying charge transports and Joule heat dissipation. Room-temperature and long-distance spin waves propagating within nanoscale spin channels are considered promising for integrated magnonic applications, but experimentally challenging. Here we report that long-distance propagation of chiral magnonic edge states can be achieved at room temperature in manganite thin films with long, antiferromagnetically coupled spin spirals (millimetre length) and low magnetic Gilbert damping (~3.

View Article and Find Full Text PDF

Spin-polarized edge states in two-dimensional materials hold promise for spintronics and quantum computing applications. Constructing stable edge states by tailoring two-dimensional semiconductor materials with bulk-boundary correspondence is a feasible approach. Recently layered NiI is suggested as a two-dimensional type-II multiferroic semiconductor with intrinsic spiral spin ordering and chirality-induced electric polarization.

View Article and Find Full Text PDF

The frustrated honeycomb spin model can stabilize a subextensively degenerate spiral spin liquid with nontrivial topological excitations and defects, but its material realization remains rare. Here, we report the experimental realization of this model in the structurally disorder-free compound GdZnPO. Using a single-crystal sample, we find that spin-7/2 rare-earth Gd^{3+} ions form a honeycomb lattice with dominant second-nearest-neighbor antiferromagnetic and first-nearest-neighbor ferromagnetic couplings, along with easy-plane single-site anisotropy.

View Article and Find Full Text PDF

Estimation of PEMFC optimal parameters based on an improved butterfly optimization algorithm.

Phys Chem Chem Phys

December 2024

Post Industry Technology Research and Development Center of the State Posts Bureau (Internet of Things Technology), Nanjing University of Posts and Telecommunications, Nanjing 210023, P.R. China.

This paper introduces a novel butterfly optimization algorithm, called the spiral search and dynamic crossover based butterfly optimization algorithm (SCBO), for parameter estimation in proton exchange membrane fuel cell (PEMFC) models. To enhance the global performance of the butterfly algorithm, a spin-search strategy is incorporated to expand its exploration range, while an adaptive factor is introduced to strike a balance between exploration and exploitation. Additionally, a dynamic crossover operation is integrated to enhance solution diversity, addressing the algorithm's tendency to converge to local optima.

View Article and Find Full Text PDF

Tunable Electron Correlation in Epitaxial 1T-TaS Spirals.

Adv Mater

December 2024

Department of Materials Science & Engineering, National Tsing Hua University, Hsinchu, 30013, Taiwan.

Tantalum disulfide (1T-TaS), being a Mott insulator with strong electron correlation, is highlighted for diverse collective quantum states in the 2D lattice, including charge density wave (CDW), spin liquid, and unconventional superconductivity. The Mott physics embedded in the 2D triangular CDW lattice has raised debates on stacking-dependent properties because interlayer interactions are sensitive to van der Waals (vdW) spacing. However, control of interlayer distance remains a challenge.

View Article and Find Full Text PDF

Want AI Summaries of new PubMed Abstracts delivered to your In-box?

Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!