Abstract
We have modeled magneto-dielectric phase transitions in ABX 3-type layered triangular lattice compounds. The model consists of a spin system (magnetic transition) and a lattice system (dielectric transition). Magnetic exchange interactions are supposed to change with a relative position between two spins. This assumption produces an effective coupling between the lattice and the spin. Applying the nonequilibrium relaxation method, we have found that a simultaneous magneto-dielectric phase transition occurs when energy scales of the spin part and the lattice part coincide. An intermediate phase like the partial disordered phase disappears. Both systems relax frustration of the other system cooperatively and realize ordered states.
| Original language | English |
|---|---|
| Pages (from-to) | 254-261 |
| Number of pages | 8 |
| Journal | Journal of the Physical Society of Japan |
| Volume | 73 |
| Issue number | 1 |
| DOIs | |
| Publication status | Published - 2004 Jan |
| Externally published | Yes |
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Keywords
- Layered triangular lattice
- Magneto-dielectric transition
- Nonequilibrium relaxation method
- Relaxation of frustration by lattice distortion
ASJC Scopus subject areas
- Physics and Astronomy(all)
Cite this
A simultaneous magneto-dielectric phase transition in RbCoBr3. / Shirahata, Takashi; Nakamura, Tota.
In: Journal of the Physical Society of Japan, Vol. 73, No. 1, 01.2004, p. 254-261.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - A simultaneous magneto-dielectric phase transition in RbCoBr3
AU - Shirahata, Takashi
AU - Nakamura, Tota
PY - 2004/1
Y1 - 2004/1
N2 - We have modeled magneto-dielectric phase transitions in ABX 3-type layered triangular lattice compounds. The model consists of a spin system (magnetic transition) and a lattice system (dielectric transition). Magnetic exchange interactions are supposed to change with a relative position between two spins. This assumption produces an effective coupling between the lattice and the spin. Applying the nonequilibrium relaxation method, we have found that a simultaneous magneto-dielectric phase transition occurs when energy scales of the spin part and the lattice part coincide. An intermediate phase like the partial disordered phase disappears. Both systems relax frustration of the other system cooperatively and realize ordered states.
AB - We have modeled magneto-dielectric phase transitions in ABX 3-type layered triangular lattice compounds. The model consists of a spin system (magnetic transition) and a lattice system (dielectric transition). Magnetic exchange interactions are supposed to change with a relative position between two spins. This assumption produces an effective coupling between the lattice and the spin. Applying the nonequilibrium relaxation method, we have found that a simultaneous magneto-dielectric phase transition occurs when energy scales of the spin part and the lattice part coincide. An intermediate phase like the partial disordered phase disappears. Both systems relax frustration of the other system cooperatively and realize ordered states.
KW - Layered triangular lattice
KW - Magneto-dielectric transition
KW - Nonequilibrium relaxation method
KW - Relaxation of frustration by lattice distortion
UR - http://www.scopus.com/inward/record.url?scp=21144452645&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=21144452645&partnerID=8YFLogxK
U2 - 10.1143/JPSJ.73.254
DO - 10.1143/JPSJ.73.254
M3 - Article
AN - SCOPUS:21144452645
VL - 73
SP - 254
EP - 261
JO - Journal of the Physical Society of Japan
JF - Journal of the Physical Society of Japan
SN - 0031-9015
IS - 1
ER -