The use of hydrogen atoms for magneto-ionic applications has only been explored recently. Benefits of hydrogen compared to other ionic species for tuning magnetism are high switching speed and large changes in magnetic moment. Here, we test the influence of hydrogen intercalation on magnetism in nanoporous Pd_(1−x)Co_x, with Co being located in superparamagnetic clusters, building upon a previously suggested material system. Tailoring the Co concentration and distribution allows the magnitude of the magneto-electric effect to be influenced as well as to gain a deeper understanding of the interaction of hydrogen with magnetic clusters. In situ magnetization measurements are conducted to directly observe the variation in magnetic moment upon hydrogen-charging in nanoporous Pd_(1−x)Co_x. Temperature-dependent magnetization curves show that interstitial hydrogen atoms lead to an increase in magnetic anisotropy energy, a coupling of individual Co-rich clusters, and the concomitant blocking of their magnetic moments. The large obtained magnetic switching effects upon hydrogen-charging at room temperature (α_C,V > 400 Oe V⁻¹; ΔM = 1.5 emu g⁻¹) open up new possibilities to use magneto-ionic effects for real-life applications in magnetic devices.

中文翻译：

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纳米多孔Pd1-xCox用于氢嵌入磁离子

直到最近才探索将氢原子用于磁离子应用。与其他离子物种相比，氢在调节磁场方面的优势是开关速度高且磁矩变化大。在此，我们在先前建议的材料体系基础上，测试了氢插层对纳米多孔Pd _（1-x） Co _x中磁性的影响，其中Co位于超顺磁性簇中。调整Co的浓度和分布不仅可以影响磁电效应的大小，而且可以使人们对氢与磁簇的相互作用有更深入的了解。原位进行磁化测量以直接观察纳米多孔Pd _（1-x） Co _x中充氢时磁矩的变化。随温度变化的磁化曲线表明，间隙氢原子导致磁各向异性能增加，单个富Co团簇耦合，并随之阻止了它们的磁矩。在室温下充氢时获得的大量磁开关效应（αC _，V > 400 Oe V ^-1 ; ΔM = 1.5 emu g ^-1）为在现实生活中应用磁离子效应开辟了新的可能性。磁性设备。