[14p-A404-10~19] 17.3 Layered materials

△ [14p-A404-13] Increase in Ferromagnetic Transition Temperature on two-dimensional Ferromagnet Cr₂Ge₂Te₆ induced by heterointerface

〇Hiroshi Idzuchi^1,2, Andres E Llacsahuanga Allcca², Xing-chen Pan¹, Katsumi Tanigaki¹, Yong P Cehn^1,2,3,4 (1.Tohoku Univ. AIMR, 2.Purdue Univ. QSEI., 3.Tohoku Univ. CSIS, 4.Purdue Univ. ECE&Nano)

Keywords:two-dimensional materials, Ferromanget, van der Waals material

Recently, magnetism in layered van der Waals (vdW) materials has attracted great attention because of their unique magnetic properties stemming from their two-dimensional (2D) nature. Such layered vdW materials provide an opportunity to fabricate heterostructures free from constraints in conventional film growth and promise a unique route to explore new functionality of these materials based on the electric field and crystalline symmetry. One of the major issues in vdW ferromagnets is that the ferromagnetic transition temperature (Curie temperature) is relatively low. Here, we study magnetic properties in heterostructures of vdW ferromagnet Cr₂Ge₂Te₆. We will report magneto-optical Kerr effects and detect hysteresis arising from ferromagnetism. The maximum Curie temperature (T_C) observed in heterostructure reaches ~120 K, which is nearly twice the maximum T_C ~ 60 K reported for Cr₂Ge₂Te₆ alone.