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Monte Carlo simulation on ferroelectric response to magnetic field in an elastic Ising spin chain
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10.1063/1.3153113
/content/aip/journal/jap/106/1/10.1063/1.3153113
http://aip.metastore.ingenta.com/content/aip/journal/jap/106/1/10.1063/1.3153113

Figures

Image of FIG. 1.
FIG. 1.

The up-up-down-down Ising spin chain combining with the alternating ionic order in two ways sketched in (a) with ionic displacement of and (b) with . (c) An ionic chain with an UDSD of since there is only one separate spin pair as marked by a dotted box. (d) An ionic chain with an UDSD of , namely, there are two separate spin pairs presented in a dotted rectangle. All the directions of displacement for the mobile ions have been shown as the arrows. The other mobile ions without arrow have not certain displacement direction because their left and right neighbors have the same spin orientations to it. Therefore their displacements are always too small.

Image of FIG. 2.
FIG. 2.

(a) The temperature dependences of electric polarization along the chain direction and dc magnetic susceptibility of single crystal are reproduced from the experimental results in Ref. 19. Here curves were taken under magnetic fields of , 4, and 7 T. curve was obtained upon . The simulation results are presented in (b) and (c). (b) The curves under , 1, 2, and 4, and curve upon . (c) against under , 1, 2, and 4. The dotted lines mark the positions of the critical temperatures , , and .

Image of FIG. 3.
FIG. 3.

PUDN and NUDN as functions of under , 1, 2, and 4 for different are displayed respectively. Since PUDN and NUDN obviously decrease for larger , only domain with , 2, 3, and 4 are displayed here. [(a)–(d)] curves under , 1, 2, and 4 for different , namely, from (a) to (d) , 2, 3, and 4. [(e)–(h)] curves upon , 1, 2, and 4 for different , namely, from (e) to (h) , 2, 3, and 4. The dotted lines mark the positions of , , and .

Image of FIG. 4.
FIG. 4.

[(a)–(d)] curves under , 1, 2, and 4 for different , namely, from (a) to (d) , 3, 4, and 5. [(e)–(h)] curves upon , 1, 2, and 4 for different , namely, from (e) to (h) , 3, 4, and 5. Here is the size of displacement domain, and the dotted lines mark the positions of , , and .

Tables

Generic image for table
Table I.

System parameters chosen for the simulation.

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/content/aip/journal/jap/106/1/10.1063/1.3153113
2009-07-01
2014-04-24
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Monte Carlo simulation on ferroelectric response to magnetic field in an elastic Ising spin chain
http://aip.metastore.ingenta.com/content/aip/journal/jap/106/1/10.1063/1.3153113
10.1063/1.3153113
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