论文标题
Van der Waals Feromagnet Fe $ _3 $ gete $ _2 $纳米片
Gate-Tuned Interlayer Coupling in van der Waals Ferromagnet Fe$_3$GeTe$_2$ Nanoflakes
论文作者
论文摘要
范德华（VDW）磁体中的弱层间耦合已将其应用限制在二维（2D）自旋设备上。 Here, we demonstrate that the interlayer coupling in a vdW magnet Fe$_3$GeTe$_2$ (FGT) can be largely modulated by a protonic gate.With the increase of the protons intercalated among vdW layers,interlayer magnetic coupling increases.Because of the existence of antiferromagnetic layers in FGT nanoflakes, the increasing interlayer magnetic耦合诱导质子化FGT纳米片的交换偏差。最引人注目的是，当将较高的正极电压（VG> 4.36 V）应用于蛋白栅极时，已经观察到了很少见到的零场冷却（ZFC）交换偏置（最大值高达1.2 KOE），这清楚地表明，该质子表明，质子互面积实现了强层套管。如此强大的层间耦合将为VDW磁铁提供更广泛的应用。
The weak interlayer coupling in van der Waals (vdW) magnets has confined their application to two dimensional (2D) spintronic devices. Here, we demonstrate that the interlayer coupling in a vdW magnet Fe$_3$GeTe$_2$ (FGT) can be largely modulated by a protonic gate.With the increase of the protons intercalated among vdW layers,interlayer magnetic coupling increases.Because of the existence of antiferromagnetic layers in FGT nanoflakes, the increasing interlayer magnetic coupling induces exchange bias in protonated FGT nanoflakes. Most strikingly, a rarely seen zero-field cooled (ZFC) exchange bias with very large values (maximally up to 1.2 kOe) has been observed when higher positive voltages (Vg>4.36 V) are applied to the protonic gate, which clearly demonstrates that a strong interlayer coupling is realized by proton intercalation. Such strong interlayer coupling will enable a wider range of applications for vdW magnets.
