SPECIFIC HEAT AND DIELECTRIC SUSCEPTIBILITY OF FERROELECTRIC THIN FILMS

Q: How can I download an article?

To download an article from SID, first log in to the site, search for the article title, and click on the 'Download Article' option.

Q: How can I download an ISI article?

To download an ISI article on SID, enter the keyword or article title in the search bar, view the relevant results, click on the desired article, and select the 'Download Article' option.

Q: How can I access the SID database?

To access the SID database, visit SID.ir, create an account, and log in to access scientific resources.

Q: Is downloading articles from SID free?

Some articles on SID are available for free, while others require payment. Details are specified on the article's page.

FARJAMI SHAYESTEH S.; SOLEIMANI M.A.

مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resources

Journal Paper

Paper Information

Journal: Iranian Journal of Crystallography and Mineralogy Year:2002 | Volume:10 | Issue:2 Page(s): 117-130

Download Full-Text

Persian Verion

View:

729

Download:

Cites:

Information Journal Paper

Title

SPECIFIC HEAT AND DIELECTRIC SUSCEPTIBILITY OF FERROELECTRIC THIN FILMS

Author(s)

FARJAMI SHAYESTEH S. | SOLEIMANI M.A. | Issue Writer Certificate

Keywords

ISING MODELQ4

MEAN- FIELD APPROXIMATIONQ4

SPECIFIC HEATQ4

SUSCEPTIBILITYQ4

CURIE TEMPERATUREQ4

EXCHANGE STRENGTHQ4

TRANSVERSE FIELDQ4

Abstract

In this paper, ferroelectric thin films, described by an ISING MODEL in a TRANSVERSE FIELD, have been studied under the mean-field approximation. We discuss a thin film composed of N-layer film of simple cubic symmetry with nearest-neighbor exchange in which the EXCHANGE STRENGTH and TRANSVERSE FIELD are assumed to be different from the bulk values in Ns surface layers, and we derive and illustrate expression for SPECIFIC HEAT and SUSCEPTIBILITY. In such films, the CURIE TEMPERATURE can shift to either lower or higher temperature compared with the corresponding bulk value. If the surface EXCHANGE STRENGTH is strong enough, there is still a phase transition to ferroelectricity even when the TRANSVERSE FIELD is larger than the bulk critical value. The bulk peak of the SPECIFIC HEAT becomes a discontinuity at the film CURIE TEMPERATURE. There is a rounded peak at the bulk CURIE TEMPERATURE if the surface EXCHANGE STRENGTH is higher than the critical value. The film SUSCEPTIBILITY still diverges at the film CURIE TEMPERATURE, as does the bulk SUSCEPTIBILITY, but its magnitude is reduced. Also there is a rounded peak at the bulk CURIE TEMPERATURE when the surface EXCHANGE STRENGTH exceeds the critical value. The bulk related character of the SPECIFIC HEAT and SUSCEPTIBILITY is less pronounced and the surface - related character is more pronounced when the film thickness is small, or the surface – layer number is large.

Cites

No record.

References

No record.

Cite

APA: Copy

FARJAMI SHAYESTEH, S., & SOLEIMANI, M.A.. (2002). SPECIFIC HEAT AND DIELECTRIC SUSCEPTIBILITY OF FERROELECTRIC THIN FILMS. IRANIAN JOURNAL OF CRYSTALLOGRAPHY AND MINERALOGY, 10(2), 117-130. SID. https://sid.ir/paper/4152/en

Vancouver: Copy

FARJAMI SHAYESTEH S., SOLEIMANI M.A.. SPECIFIC HEAT AND DIELECTRIC SUSCEPTIBILITY OF FERROELECTRIC THIN FILMS. IRANIAN JOURNAL OF CRYSTALLOGRAPHY AND MINERALOGY[Internet]. 2002;10(2):117-130. Available from: https://sid.ir/paper/4152/en

IEEE: Copy

S. FARJAMI SHAYESTEH, and M.A. SOLEIMANI, “SPECIFIC HEAT AND DIELECTRIC SUSCEPTIBILITY OF FERROELECTRIC THIN FILMS,” IRANIAN JOURNAL OF CRYSTALLOGRAPHY AND MINERALOGY, vol. 10, no. 2, pp. 117–130, 2002, [Online]. Available: https://sid.ir/paper/4152/en

Related Journal Papers