Abstract
By molecular dynamics simulation, we have investigated classical Heisenberg spins, which are arrayed on a finite simple cubic lattice and interact with each other only by the dipole-dipole interaction, and have found its peculiar from-edge-to-interior freezing process. As the temperature is decreased, spins on each edge predominantly start to freeze in a ferromagnetic alignment parallel to the edge around the corresponding bulk transition temperature, then from each edge grow domains with short-ranged orders similar to the corresponding bulk orders, and finally the system is expected to end up with a unique multidomain ground state at the lowest temperature. We infer that these freezing characteristics are attributed to the anisotropic and long-range nature of the dipole-dipole interaction combined with a finite-size effect.
| Original language | English |
|---|---|
| Pages (from-to) | 2651-2654 |
| Number of pages | 4 |
| Journal | Journal of the Physical Society of Japan |
| Volume | 74 |
| Issue number | 10 |
| DOIs | |
| Publication status | Published - 2005 Oct |
| Externally published | Yes |
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Keywords
- Magnetic dipolar system
- Magnetic domain
- Nanomagnetism
- Spin dynamics simulation
- Spin-freezing characteristics
ASJC Scopus subject areas
- Physics and Astronomy(all)
Cite this
Peculiar 'from-edge-to-interior' spin freezing in a magnetic dipolar cube. / Matsushita, Katsuyoshi; Sugano, Ryoko; Kuroda, Akiyoshi; Tomita, Yusuke; Takayama, Hajime.
In: Journal of the Physical Society of Japan, Vol. 74, No. 10, 10.2005, p. 2651-2654.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Peculiar 'from-edge-to-interior' spin freezing in a magnetic dipolar cube
AU - Matsushita, Katsuyoshi
AU - Sugano, Ryoko
AU - Kuroda, Akiyoshi
AU - Tomita, Yusuke
AU - Takayama, Hajime
PY - 2005/10
Y1 - 2005/10
N2 - By molecular dynamics simulation, we have investigated classical Heisenberg spins, which are arrayed on a finite simple cubic lattice and interact with each other only by the dipole-dipole interaction, and have found its peculiar from-edge-to-interior freezing process. As the temperature is decreased, spins on each edge predominantly start to freeze in a ferromagnetic alignment parallel to the edge around the corresponding bulk transition temperature, then from each edge grow domains with short-ranged orders similar to the corresponding bulk orders, and finally the system is expected to end up with a unique multidomain ground state at the lowest temperature. We infer that these freezing characteristics are attributed to the anisotropic and long-range nature of the dipole-dipole interaction combined with a finite-size effect.
AB - By molecular dynamics simulation, we have investigated classical Heisenberg spins, which are arrayed on a finite simple cubic lattice and interact with each other only by the dipole-dipole interaction, and have found its peculiar from-edge-to-interior freezing process. As the temperature is decreased, spins on each edge predominantly start to freeze in a ferromagnetic alignment parallel to the edge around the corresponding bulk transition temperature, then from each edge grow domains with short-ranged orders similar to the corresponding bulk orders, and finally the system is expected to end up with a unique multidomain ground state at the lowest temperature. We infer that these freezing characteristics are attributed to the anisotropic and long-range nature of the dipole-dipole interaction combined with a finite-size effect.
KW - Magnetic dipolar system
KW - Magnetic domain
KW - Nanomagnetism
KW - Spin dynamics simulation
KW - Spin-freezing characteristics
UR - http://www.scopus.com/inward/record.url?scp=27144533711&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=27144533711&partnerID=8YFLogxK
U2 - 10.1143/JPSJ.74.2651
DO - 10.1143/JPSJ.74.2651
M3 - Article
VL - 74
SP - 2651
EP - 2654
JO - Journal of the Physical Society of Japan
JF - Journal of the Physical Society of Japan
SN - 0031-9015
IS - 10
ER -