Stabilizing spin spirals and isolated skyrmions at low magnetic field exploiting vanishing magnetic anisotropy.
Stabilizing spin spirals and isolated skyrmions at low magnetic field exploiting vanishing magnetic anisotropy.
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DOI:
10.1038/s41467-018-03240-w
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发表时间:
2018-03-09
影响因子:
16.6
通讯作者:
Wulfhekel W
中科院分区:
文献类型:
--
作者:
Hervé M;Dupé B;Lopes R;Böttcher M;Martins MD;Balashov T;Gerhard L;Sinova J;Wulfhekel W
Skyrmions are topologically protected non-collinear magnetic structures. Their stability is ideally suited to carry information in, e.g., racetrack memories. The success of such a memory critically depends on the ability to stabilize and manipulate skyrmions at low magnetic fields. The non-collinear Dzyaloshinskii-Moriya interaction originating from spin-orbit coupling drives skyrmion formation. It competes with Heisenberg exchange and magnetic anisotropy favoring collinear states. Isolated skyrmions in ultra-thin films so far required magnetic fields as high as several Tesla. Here, we show that isolated skyrmions in a monolayer of Co/Ru(0001) can be stabilized down to vanishing fields. Even with the weak spin-orbit coupling of the 4d element Ru, homochiral spin spirals and isolated skyrmions were detected with spin-sensitive scanning tunneling microscopy. Density functional theory calculations explain the stability of the chiral magnetic features by the absence of magnetic anisotropy energy. Skyrmions are promising for spintronics but usually require large spin-orbit coupling of 5d-metals and external magnetic field. Here the authors realize stabilization of isolated skyrmions at a 4d-metal interface of weak chiral interaction and magnetic anisotropy down to vanishing field.
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影响因子:
16.6
作者:
Hrabec A;Sampaio J;Belmeguenai M;Gross I;Weil R;Chérif SM;Stashkevich A;Jacques V;Thiaville A;Rohart S
通讯作者:
Rohart S
影响因子:
56.9
作者:
Jiang, Wanjun;Upadhyaya, Pramey;Hoffmann, Axel
通讯作者:
Hoffmann, Axel
影响因子:
8.6
作者:
Ferriani, P.;von Bergmann, K.;Wiesendanger, R.
通讯作者:
Wiesendanger, R.
影响因子:
3.7
作者:
Mendler, Daniel;Kotetes, Panagiotis;Schoen, Gerd
通讯作者:
Schoen, Gerd
影响因子:
3.3
作者:
Leonov, A. O.;Monchesky, T. L.;Wiesendanger, R.
通讯作者:
Wiesendanger, R.