Oscillation phenomenon of transition temperatures of coupled magnetic planes
Oscillatory behavior of transition temperature in supper lattice, Ni/Au/Ni, has been observed as a function of spacer layer, Au. The observed oscillation period is almost the half period of interlayer exchange coupling. The high temperature susceptibility of a two - dimensional lattice is evaluated...
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| Format: | Article |
| Language: | English |
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Isfahan University of Technology
2004-06-01
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| Series: | Iranian Journal of Physics Research |
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| Online Access: | http://ijpr.iut.ac.ir/browse.php?a_code=A-10-1-127&slc_lang=en&sid=1 |
| _version_ | 1818146016652689408 |
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| author | H. Moradi |
| author_facet | H. Moradi |
| author_sort | H. Moradi |
| collection | DOAJ |
| description | Oscillatory behavior of transition temperature in supper lattice, Ni/Au/Ni, has been observed as a function of spacer layer, Au. The observed oscillation period is almost the half period of interlayer exchange coupling. The high temperature susceptibility of a two - dimensional lattice is evaluated within the Bethe-Peierls-Wiess approximation in the presence of a random field with square distribution. This susceptibility is used to evaluate the transition temperature of coupled planes as a function of spacer thickness. The calculated transition temperature of coupled planes oscillates as half period of interlayer exchange coupling and falls below the results of the uncoupled films at some values of the average spacer thickness that were experimentally observed. Additionally, the transition temperature depends on the distribution function of random field at the small thickness of spacer. |
| first_indexed | 2024-12-11T12:12:39Z |
| format | Article |
| id | doaj.art-2a61071288764190b863b9319abfecc8 |
| institution | Directory Open Access Journal |
| issn | 1682-6957 |
| language | English |
| last_indexed | 2024-12-11T12:12:39Z |
| publishDate | 2004-06-01 |
| publisher | Isfahan University of Technology |
| record_format | Article |
| series | Iranian Journal of Physics Research |
| spelling | doaj.art-2a61071288764190b863b9319abfecc82022-12-22T01:07:44ZengIsfahan University of TechnologyIranian Journal of Physics Research1682-69572004-06-0142224224Oscillation phenomenon of transition temperatures of coupled magnetic planesH. MoradiOscillatory behavior of transition temperature in supper lattice, Ni/Au/Ni, has been observed as a function of spacer layer, Au. The observed oscillation period is almost the half period of interlayer exchange coupling. The high temperature susceptibility of a two - dimensional lattice is evaluated within the Bethe-Peierls-Wiess approximation in the presence of a random field with square distribution. This susceptibility is used to evaluate the transition temperature of coupled planes as a function of spacer thickness. The calculated transition temperature of coupled planes oscillates as half period of interlayer exchange coupling and falls below the results of the uncoupled films at some values of the average spacer thickness that were experimentally observed. Additionally, the transition temperature depends on the distribution function of random field at the small thickness of spacer.http://ijpr.iut.ac.ir/browse.php?a_code=A-10-1-127&slc_lang=en&sid=1coupled magnetic planestransition temperaturerandom fieldinterlayer exchange coupling |
| spellingShingle | H. Moradi Oscillation phenomenon of transition temperatures of coupled magnetic planes Iranian Journal of Physics Research coupled magnetic planes transition temperature random field interlayer exchange coupling |
| title | Oscillation phenomenon of transition temperatures of coupled magnetic planes |
| title_full | Oscillation phenomenon of transition temperatures of coupled magnetic planes |
| title_fullStr | Oscillation phenomenon of transition temperatures of coupled magnetic planes |
| title_full_unstemmed | Oscillation phenomenon of transition temperatures of coupled magnetic planes |
| title_short | Oscillation phenomenon of transition temperatures of coupled magnetic planes |
| title_sort | oscillation phenomenon of transition temperatures of coupled magnetic planes |
| topic | coupled magnetic planes transition temperature random field interlayer exchange coupling |
| url | http://ijpr.iut.ac.ir/browse.php?a_code=A-10-1-127&slc_lang=en&sid=1 |
| work_keys_str_mv | AT hmoradi oscillationphenomenonoftransitiontemperaturesofcoupledmagneticplanes |