Thickness dependent properties of magnetic ultrathinfilms
The dependence of magnetic properties on the thickness of few-layer thin
films is investigated at finite temperature using the functional
integral method for solving the Heisenberg spinmodel.The temperature
dependence of the ultra-thin film's magnetization and Curie
temperatureare calculated in termsofthemean field theory and of the
Gaussian spin fluctuation approximations.It has been shown that both
Curie temperature and temperature interval,where the magnetization is
non-zero,are strongly reduced with the thickness reduction by using the
spin fluctuation approximation sin comparison with the mean field
results.Curie temperature dependence on the film thickness calculated
numeri cally well agrees with the experimental data for Ni/Cu(100)and
Ni/Cu(111)ultrathin films.
| Title: | Thickness dependent properties of magnetic ultrathinfilms |
| Authors: | Bach, Thanh Cong Pham, Huong Thao |
| Keywords: | Thin film Magnetic properties Functional integral method |
| Issue Date: | 2013 |
| Publisher: | H. : ĐHQGHN |
| Abstract: | The dependence of magnetic properties on the thickness of few-layer thin films is investigated at finite temperature using the functional integral method for solving the Heisenberg spinmodel.The temperature dependence of the ultra-thin film's magnetization and Curie temperatureare calculated in termsofthemean field theory and of the Gaussian spin fluctuation approximations.It has been shown that both Curie temperature and temperature interval,where the magnetization is non-zero,are strongly reduced with the thickness reduction by using the spin fluctuation approximation sin comparison with the mean field results.Curie temperature dependence on the film thickness calculated numeri cally well agrees with the experimental data for Ni/Cu(100)and Ni/Cu(111)ultrathin films. © 2013 Elsevier B.V. All rights reserved |
| Description: | Physica B: Condensed Matter 426, pp. 144-149 |
| URI: | http://repository.vnu.edu.vn/handle/VNU_123/27669 |
| Appears in Collections: | Bài báo của ĐHQGHN trong Scopus |
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