4.7 Article

Epitaxial integration of a perpendicularly magnetized ferrimagnetic metal on a ferroelectric oxide for electric-field control

Journal

RARE METALS
Volume 41, Issue 5, Pages 1554-1562

Publisher

NONFERROUS METALS SOC CHINA
DOI: 10.1007/s12598-021-01898-8

Keywords

Ferroelectric oxides; Ferrimagnetic metals; PMN-PT; Mn2Ga; Anomalous Hall effect

Funding

  1. National Natural Science Foundation of China [52121001, 51822101, 51861135104, 51771009]

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This study reports the optimization of epitaxial growth of a tetragonal perpendicularly magnetized ferrimagnet Mn2Ga, as well as the successful integration of high-quality epitaxial Mn2Ga thin films onto a ferroelectric single crystal. The anomalous Hall effect of this ferrimagnet can be effectively modulated by a small electric field over a large temperature range in a nonvolatile manner. This work demonstrates the great potential of ferrimagnets for developing high-density and low-power spintronic devices.
Ferrimagnets, which contain the advantages of both ferromagnets (detectable moments) and antiferromagnets (ultrafast spin dynamics), have recently attracted great attention. Here, we report the optimization of epitaxial growth of a tetragonal perpendicularly magnetized ferrimagnet Mn2Ga on MgO. Electrical transport, magnetic properties and the anomalous Hall effect (AHE) were systematically studied. Furthermore, we successfully integrated high-quality epitaxial ferrimagnetic Mn2Ga thin films onto ferroelectric 0.7PbMg(1/3)Nb(2/3)O(3)-0.3PbTiO(3) single crystals with a MgO buffer layer. It was found that the AHE of such a ferrimagnet can be effectively modulated by a small electric field over a large temperature range in a nonvolatile manner. This work thus demonstrates the great potential of ferrimagnets for developing high-density and low-power spintronic devices.

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