Interfacial orbital preferential occupation induced controllable uniaxial magnetic anisotropy observed in Ni/NiO(110) heterostructures
Condensed matter physics: unexpected magnetic anisotropy emerges in a heterostructure An unexpected magnetic anisotropy emerges at the interface of nickel and nickel oxide, which is attributed to the anisotropic orbital occupation of interfacial nickel ions. A team led by Yuan-Hua Lin at the Tsinghu...
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| Autores principales: | , , , , , , , , |
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| Formato: | article |
| Lenguaje: | EN |
| Publicado: |
Nature Portfolio
2017
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| Materias: | |
| Acceso en línea: | https://doaj.org/article/855d0ebf303e4eb9b7f064115abeb308 |
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| Sumario: | Condensed matter physics: unexpected magnetic anisotropy emerges in a heterostructure An unexpected magnetic anisotropy emerges at the interface of nickel and nickel oxide, which is attributed to the anisotropic orbital occupation of interfacial nickel ions. A team led by Yuan-Hua Lin at the Tsinghua University and collaborators at the University of Tokyo and Northeastern University investigated the magnetic properties of a Ni/NiO heterostructure grown on SrTiO3 substrate. They observed an unexpected magnetic anisotropy along an in-plane axis at the Ni and NiO (110) interface. By measuring the thickness and temperature dependence, they excluded the interfacial exchange coupling as a mechanism. Instead, further local magnetic measurements revealed that an anisotropic orbital occupancy of interfacial nickel ions drove the emergence of such a magnetic anisotropy. This result may provide a helpful insight to manipulate this magnetic anisotropy in spintronic applications by strain engineering. |
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