Abstract
We have investigated, by the Monte Carlo simulation, spin systems which represent moments of arrayed magnetic nanoparticles interacting with each other only by the dipole-dipole interaction. In the present paper we aim the understanding of finite size effects on the magnetic nanoparticles arrayed in hexagonal columns cut out from the close-packing structures or from those with uniaxial compression. In columns with the genuine close-packing structures, we observe a single vortex state which is also observed previously in finite two-dimensional systems. On the other hand in the system with the inter-layer distance set 1 / sqrt(2) times of the close-packing one, we found ground states which depend on the number of layers. The dependence is induced by a finite size effect and is related to a orientation transition in the corresponding bulk system.
| Original language | English |
|---|---|
| Pages (from-to) | 1416-1418 |
| Number of pages | 3 |
| Journal | Journal of Magnetism and Magnetic Materials |
| Volume | 310 |
| Issue number | 2 SUPPL. PART 2 |
| DOIs | |
| Publication status | Published - 2007 Mar |
| Externally published | Yes |
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Keywords
- Dipole-dipole interaction
- Finite size effect
- Magnetic nanoparticles
- Monte Carlo simulation
ASJC Scopus subject areas
- Condensed Matter Physics
Cite this
Finite dipolar hexagonal columns on piled layers of triangular lattice. / Matsushita, Katsuyoshi; Sugano, Ryoko; Kuroda, Akiyoshi; Tomita, Yusuke; Takayama, Hajime.
In: Journal of Magnetism and Magnetic Materials, Vol. 310, No. 2 SUPPL. PART 2, 03.2007, p. 1416-1418.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Finite dipolar hexagonal columns on piled layers of triangular lattice
AU - Matsushita, Katsuyoshi
AU - Sugano, Ryoko
AU - Kuroda, Akiyoshi
AU - Tomita, Yusuke
AU - Takayama, Hajime
PY - 2007/3
Y1 - 2007/3
N2 - We have investigated, by the Monte Carlo simulation, spin systems which represent moments of arrayed magnetic nanoparticles interacting with each other only by the dipole-dipole interaction. In the present paper we aim the understanding of finite size effects on the magnetic nanoparticles arrayed in hexagonal columns cut out from the close-packing structures or from those with uniaxial compression. In columns with the genuine close-packing structures, we observe a single vortex state which is also observed previously in finite two-dimensional systems. On the other hand in the system with the inter-layer distance set 1 / sqrt(2) times of the close-packing one, we found ground states which depend on the number of layers. The dependence is induced by a finite size effect and is related to a orientation transition in the corresponding bulk system.
AB - We have investigated, by the Monte Carlo simulation, spin systems which represent moments of arrayed magnetic nanoparticles interacting with each other only by the dipole-dipole interaction. In the present paper we aim the understanding of finite size effects on the magnetic nanoparticles arrayed in hexagonal columns cut out from the close-packing structures or from those with uniaxial compression. In columns with the genuine close-packing structures, we observe a single vortex state which is also observed previously in finite two-dimensional systems. On the other hand in the system with the inter-layer distance set 1 / sqrt(2) times of the close-packing one, we found ground states which depend on the number of layers. The dependence is induced by a finite size effect and is related to a orientation transition in the corresponding bulk system.
KW - Dipole-dipole interaction
KW - Finite size effect
KW - Magnetic nanoparticles
KW - Monte Carlo simulation
UR - http://www.scopus.com/inward/record.url?scp=33847267332&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=33847267332&partnerID=8YFLogxK
U2 - 10.1016/j.jmmm.2006.10.426
DO - 10.1016/j.jmmm.2006.10.426
M3 - Article
VL - 310
SP - 1416
EP - 1418
JO - Journal of Magnetism and Magnetic Materials
JF - Journal of Magnetism and Magnetic Materials
SN - 0304-8853
IS - 2 SUPPL. PART 2
ER -