Effective reduction of PdCoO2 thin films via hydrogenation and sign tunable anomalous Hall effect
Effective reduction of PdCoO2 thin films via hydrogenation and sign tunable anomalous Hall effect
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通过氢化和符号可调反常霍尔效应有效还原 PdCoO2 薄膜
DOI：
10.1103/physrevmaterials.5.l052001
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发表时间：
2021
影响因子：
3.4
通讯作者：
Unocic, Raymond R.
中科院分区：
文献类型：
--
作者：
Rimal, Gaurab;Schmidt, Caleb;Hijazi, Hussein;Feldman, Leonard C.;Liu, Yiting;Skoropata, Elizabeth;Lapano, Jason;Brahlek, Matthew;Mukherjee, Debangshu;Unocic, Raymond R.
属于称为铜铁矿的三角形氧化物家族，是最导电的氧化物之一。它的面内导电性与最好的金属相当，并在低温下具有极长的平均自由程的流体动力学电子输运。尽管如此，尽管存在钴离子，它仍是稳定的。在这里，我们表明，一个温和的氢化过程reducesthin薄膜的原子混合合金的PdCo具有强大的面外铁磁性和符号可调的反常霍尔效应。考虑到许多其他化合物在类似的氢化条件下几乎没有受到影响，这一发现可能提供一种途径，以创造新的自旋电子异质结构结合强铁磁性，涉及氧化物和其他功能材料。
, belonging to a family of triangular oxides called delafossite, is one of the most conducting oxides. Its in-plane conductivity is comparable to those of the best metals and exhibits hydrodynamic electronic transport with an extremely long mean free path at cryogenic temperatures. Nonetheless, it is nonmagnetic despite the presence of the cobalt ion. Here, we show that a mild hydrogenation process reducesthin films to an atomically mixed alloy of PdCo with strong out-of-plane ferromagnetism and sign-tunable anomalous Hall effect. Considering that many other compounds remain little affected under a similar hydrogenation condition, this discovery may provide a route to creating novel spintronic heterostructures combining strong ferromagnetism, involving oxides and other functional materials.