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Interfacial origin of inverse magnetoresistance in uncoupled Fe/Si/Fe/Ru sandwiches
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| Zeitschriftentitel: | Applied Physics Letters |
|---|---|
| Personen und Körperschaften: | , |
| In: | Applied Physics Letters, 73, 1998, 24, S. 3592-3594 |
| Format: | E-Article |
| Sprache: | Englisch |
| veröffentlicht: |
AIP Publishing
|
| Schlagwörter: |
| author_facet |
Dinia, A. Guth, M. Dinia, A. Guth, M. |
|---|---|
| author |
Dinia, A. Guth, M. |
| spellingShingle |
Dinia, A. Guth, M. Applied Physics Letters Interfacial origin of inverse magnetoresistance in uncoupled Fe/Si/Fe/Ru sandwiches Physics and Astronomy (miscellaneous) |
| author_sort |
dinia, a. |
| spelling |
Dinia, A. Guth, M. 0003-6951 1077-3118 AIP Publishing Physics and Astronomy (miscellaneous) http://dx.doi.org/10.1063/1.122834 <jats:p>Experimental evidence of inverse magnetoresistance for ferromagnetic layers separated by a Si layer is reported. A series of Fe/Si sandwiches have been prepared by ion-beam sputtering at room temperature onto a glass substrate with the following nomenclature: glass/Si20 nm/Fe5 nm/Six nm/Fe5 nm/Ru2 nm. Magnetization measurements have been performed at 300 K and show no evidence of antiferromagnetic exchange coupling. However, the magnetoresistance curves recorded at 300 K are very interesting and show a reversed magnetoresistance for sandwiches with Si spacer layer thicknesses between 1.2 and 1.5 nm. Indeed, the resistivity is smaller at zero field than at saturation. This reversed magnetoresistance is due to the superparamagnetic interfaces and finds its origin in the difference of the electronic nature of the Fe/Si interfaces and Fe/Ru interfaces. Indeed, iron silicide Fe1−ySiy at Fe/Si interfaces have scattering spin asymmetry ratios (α=ρ↓/ρ↑) larger than 1, whereas, Fe with Ru impurities at the Fe/Ru interfaces present scattering spin asymmetry ratios lower than 1.</jats:p> Interfacial origin of inverse magnetoresistance in uncoupled Fe/Si/Fe/Ru sandwiches Applied Physics Letters |
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10.1063/1.122834 |
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AIP Publishing, 1998 |
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AIP Publishing, 1998 |
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Applied Physics Letters |
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49 |
| title |
Interfacial origin of inverse magnetoresistance in uncoupled Fe/Si/Fe/Ru sandwiches |
| title_unstemmed |
Interfacial origin of inverse magnetoresistance in uncoupled Fe/Si/Fe/Ru sandwiches |
| title_full |
Interfacial origin of inverse magnetoresistance in uncoupled Fe/Si/Fe/Ru sandwiches |
| title_fullStr |
Interfacial origin of inverse magnetoresistance in uncoupled Fe/Si/Fe/Ru sandwiches |
| title_full_unstemmed |
Interfacial origin of inverse magnetoresistance in uncoupled Fe/Si/Fe/Ru sandwiches |
| title_short |
Interfacial origin of inverse magnetoresistance in uncoupled Fe/Si/Fe/Ru sandwiches |
| title_sort |
interfacial origin of inverse magnetoresistance in uncoupled fe/si/fe/ru sandwiches |
| topic |
Physics and Astronomy (miscellaneous) |
| url |
http://dx.doi.org/10.1063/1.122834 |
| publishDate |
1998 |
| physical |
3592-3594 |
| description |
<jats:p>Experimental evidence of inverse magnetoresistance for ferromagnetic layers separated by a Si layer is reported. A series of Fe/Si sandwiches have been prepared by ion-beam sputtering at room temperature onto a glass substrate with the following nomenclature: glass/Si20 nm/Fe5 nm/Six nm/Fe5 nm/Ru2 nm. Magnetization measurements have been performed at 300 K and show no evidence of antiferromagnetic exchange coupling. However, the magnetoresistance curves recorded at 300 K are very interesting and show a reversed magnetoresistance for sandwiches with Si spacer layer thicknesses between 1.2 and 1.5 nm. Indeed, the resistivity is smaller at zero field than at saturation. This reversed magnetoresistance is due to the superparamagnetic interfaces and finds its origin in the difference of the electronic nature of the Fe/Si interfaces and Fe/Ru interfaces. Indeed, iron silicide Fe1−ySiy at Fe/Si interfaces have scattering spin asymmetry ratios (α=ρ↓/ρ↑) larger than 1, whereas, Fe with Ru impurities at the Fe/Ru interfaces present scattering spin asymmetry ratios lower than 1.</jats:p> |
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| author | Dinia, A., Guth, M. |
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| author_sort | dinia, a. |
| container_issue | 24 |
| container_start_page | 3592 |
| container_title | Applied Physics Letters |
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| description | <jats:p>Experimental evidence of inverse magnetoresistance for ferromagnetic layers separated by a Si layer is reported. A series of Fe/Si sandwiches have been prepared by ion-beam sputtering at room temperature onto a glass substrate with the following nomenclature: glass/Si20 nm/Fe5 nm/Six nm/Fe5 nm/Ru2 nm. Magnetization measurements have been performed at 300 K and show no evidence of antiferromagnetic exchange coupling. However, the magnetoresistance curves recorded at 300 K are very interesting and show a reversed magnetoresistance for sandwiches with Si spacer layer thicknesses between 1.2 and 1.5 nm. Indeed, the resistivity is smaller at zero field than at saturation. This reversed magnetoresistance is due to the superparamagnetic interfaces and finds its origin in the difference of the electronic nature of the Fe/Si interfaces and Fe/Ru interfaces. Indeed, iron silicide Fe1−ySiy at Fe/Si interfaces have scattering spin asymmetry ratios (α=ρ↓/ρ↑) larger than 1, whereas, Fe with Ru impurities at the Fe/Ru interfaces present scattering spin asymmetry ratios lower than 1.</jats:p> |
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| imprint | AIP Publishing, 1998 |
| imprint_str_mv | AIP Publishing, 1998 |
| institution | DE-D161, DE-Gla1, DE-Zi4, DE-15, DE-Pl11, DE-Rs1, DE-105, DE-14, DE-Ch1, DE-L229, DE-D275, DE-Bn3, DE-Brt1 |
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| series | Applied Physics Letters |
| source_id | 49 |
| spelling | Dinia, A. Guth, M. 0003-6951 1077-3118 AIP Publishing Physics and Astronomy (miscellaneous) http://dx.doi.org/10.1063/1.122834 <jats:p>Experimental evidence of inverse magnetoresistance for ferromagnetic layers separated by a Si layer is reported. A series of Fe/Si sandwiches have been prepared by ion-beam sputtering at room temperature onto a glass substrate with the following nomenclature: glass/Si20 nm/Fe5 nm/Six nm/Fe5 nm/Ru2 nm. Magnetization measurements have been performed at 300 K and show no evidence of antiferromagnetic exchange coupling. However, the magnetoresistance curves recorded at 300 K are very interesting and show a reversed magnetoresistance for sandwiches with Si spacer layer thicknesses between 1.2 and 1.5 nm. Indeed, the resistivity is smaller at zero field than at saturation. This reversed magnetoresistance is due to the superparamagnetic interfaces and finds its origin in the difference of the electronic nature of the Fe/Si interfaces and Fe/Ru interfaces. Indeed, iron silicide Fe1−ySiy at Fe/Si interfaces have scattering spin asymmetry ratios (α=ρ↓/ρ↑) larger than 1, whereas, Fe with Ru impurities at the Fe/Ru interfaces present scattering spin asymmetry ratios lower than 1.</jats:p> Interfacial origin of inverse magnetoresistance in uncoupled Fe/Si/Fe/Ru sandwiches Applied Physics Letters |
| spellingShingle | Dinia, A., Guth, M., Applied Physics Letters, Interfacial origin of inverse magnetoresistance in uncoupled Fe/Si/Fe/Ru sandwiches, Physics and Astronomy (miscellaneous) |
| title | Interfacial origin of inverse magnetoresistance in uncoupled Fe/Si/Fe/Ru sandwiches |
| title_full | Interfacial origin of inverse magnetoresistance in uncoupled Fe/Si/Fe/Ru sandwiches |
| title_fullStr | Interfacial origin of inverse magnetoresistance in uncoupled Fe/Si/Fe/Ru sandwiches |
| title_full_unstemmed | Interfacial origin of inverse magnetoresistance in uncoupled Fe/Si/Fe/Ru sandwiches |
| title_short | Interfacial origin of inverse magnetoresistance in uncoupled Fe/Si/Fe/Ru sandwiches |
| title_sort | interfacial origin of inverse magnetoresistance in uncoupled fe/si/fe/ru sandwiches |
| title_unstemmed | Interfacial origin of inverse magnetoresistance in uncoupled Fe/Si/Fe/Ru sandwiches |
| topic | Physics and Astronomy (miscellaneous) |
| url | http://dx.doi.org/10.1063/1.122834 |