Exponential Dependence of Interlayer Exchange Coupling in Fe/MgO(001) Superlattices on Temperature
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arXiv
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| Main Authors: | , , , , , |
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| Format: | Preprint |
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2025
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| _version_ | 1866912366660157440 |
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| author | Strandqvist, Nanny Warnatz, Tobias Thórarinsdóttir, Kristbjörg Anna Vorobiev, Alexei Kapaklis, Vassilios Hjörvarsson, Björgvin |
| author_facet | Strandqvist, Nanny Warnatz, Tobias Thórarinsdóttir, Kristbjörg Anna Vorobiev, Alexei Kapaklis, Vassilios Hjörvarsson, Björgvin |
| contents | The interlayer exchange coupling in Fe/MgO(001) superlattices is found to increase exponentially with decreasing temperature. Around 150~K, the field induced response changes from discrete switching, governed by field-driven domain propagation, to a collective rotation of the magnetic layers. This transition is accompanied by a change in the magnetic ground state from 180$^{\circ}$ (antiferromagnetic) to 90$^{\circ}$ alignment between adjacent Fe layers. These effects are argued to arise from quantum well states, defined by the total thickness of the samples. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2505_05141 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Exponential Dependence of Interlayer Exchange Coupling in Fe/MgO(001) Superlattices on Temperature Strandqvist, Nanny Warnatz, Tobias Thórarinsdóttir, Kristbjörg Anna Vorobiev, Alexei Kapaklis, Vassilios Hjörvarsson, Björgvin Mesoscale and Nanoscale Physics Materials Science The interlayer exchange coupling in Fe/MgO(001) superlattices is found to increase exponentially with decreasing temperature. Around 150~K, the field induced response changes from discrete switching, governed by field-driven domain propagation, to a collective rotation of the magnetic layers. This transition is accompanied by a change in the magnetic ground state from 180$^{\circ}$ (antiferromagnetic) to 90$^{\circ}$ alignment between adjacent Fe layers. These effects are argued to arise from quantum well states, defined by the total thickness of the samples. |
| title | Exponential Dependence of Interlayer Exchange Coupling in Fe/MgO(001) Superlattices on Temperature |
| topic | Mesoscale and Nanoscale Physics Materials Science |
| url | https://arxiv.org/abs/2505.05141 |