Exchange-coupling properties of La1-xCaMnO3 ferromagnetic/antiferromagnetic multilayers
| dc.contributor.author | Moutis, N. | en |
| dc.contributor.author | Christides, C. | en |
| dc.contributor.author | Panagiotopoulos, I. | en |
| dc.contributor.author | Niarchos, D. | en |
| dc.date.accessioned | 2015-11-24T17:34:12Z | |
| dc.date.available | 2015-11-24T17:34:12Z | |
| dc.identifier.issn | 1098-0121 | - |
| dc.identifier.uri | https://olympias.lib.uoi.gr/jspui/handle/123456789/13939 | |
| dc.rights | Default Licence | - |
| dc.subject | ferromagnet-antiferromagnet bilayers | en |
| dc.subject | thin-films | en |
| dc.subject | temperature-dependence | en |
| dc.subject | blocking temperature | en |
| dc.subject | magnetic-anisotropy | en |
| dc.subject | phase-separation | en |
| dc.subject | bias | en |
| dc.subject | magnetoresistance | en |
| dc.subject | coercivity | en |
| dc.subject | nio/nife | en |
| dc.title | Exchange-coupling properties of La1-xCaMnO3 ferromagnetic/antiferromagnetic multilayers | en |
| heal.abstract | Compositionally modulated structures consisting of La1-xCaxMnO3 ferromagnetic (FM) layers (x=0.33, 0.4. 0.48) and La1-yCayMnO3 antiferromagnetic (AF) layers (y=0.52, 0.67, 0.75) were grown on (001)LaAlO3 by pulsed laser deposition. Thermomagnetic and isothermal magnetic, magnetotransport measurements reveal an exchange biasing mechanism below a blocking temperature T(B)approximate to 70 K. Between 5 K and TB, the observed exponential thermal decay of coercive (H-c) and exchange biasing (H-EB) fields follows the drop of magnetization (M-FC) in the field-cooling curves. All the experimental results indicate that thermal fluctuations, different from spin-wave demagnetization. give rise to exponential thermal decay of M-FC and determine the observed behavior of H-c and H-EB at low T. The extrapolated values of H-c and H-EB to zero temperature exhibit a quasilinear dependence on the average interfacial concentration xi=(x+y)/2, both decreasing for fixed y=0.67 while x increases or both increasing for fixed x=0.4 while y increases. | en |
| heal.access | campus | - |
| heal.fullTextAvailability | TRUE | - |
| heal.identifier.primary | Doi 10.1103/Physrevb.64.094429 | - |
| heal.identifier.secondary | <Go to ISI>://000170726000081 | - |
| heal.journalName | Physical Review B | en |
| heal.journalType | peer reviewed | - |
| heal.language | en | - |
| heal.publicationDate | 2001 | - |
| heal.publisher | The American Physical Society | en |
| heal.recordProvider | Πανεπιστήμιο Ιωαννίνων. Σχολή Θετικών Επιστημών. Τμήμα Μηχανικών Επιστήμης Υλικών | el |
| heal.type | journalArticle | - |
| heal.type.el | Άρθρο Περιοδικού | el |
| heal.type.en | Journal article | en |
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