TY - JOUR
T1 - Modified magnetism in heterostructures of Cr2Ge2Te6and oxides
AU - Llacsahuanga Allcca, A. E.
AU - Idzuchi, Hiroshi
AU - Pan, X. C.
AU - Tanigaki, K.
AU - Chen, Y. P.
N1 - Funding Information:
We thank Dr. Lu for helpful discussion. This work was supported in part by NSF (ECCS1711332 and DMR1838513), by Advanced Institute for Materials Research (AIMR) under World Premier International Research Center Initiative (WPI) of MEXT, Japan, by the Center for Science and Innovation in Spintronics Research, by the Murata Foundation (M20_012), and by a Grant-in-Aid for Scientific Research from the Ministry of Education, Culture, Sports, Science and Technology (MEXT), JSPS KAKENHI (Grant Numbers 22H01896, and 20K14399). We also acknowledge technical help from AIMR common equipment unit.
Publisher Copyright:
© 2023 Author(s).
PY - 2023/1/1
Y1 - 2023/1/1
N2 - We study the effects of interfacing the van der Waals ferromagnet Cr2Ge2Te6 with oxide layers, such as NiO and MgO, in a few different configurations. For this, the magnetic hysteresis curves, obtained by magneto optical Kerr effect, of Cr2Ge2Te6 flakes of similar thicknesses were evaluated. Compared to the properties of a bare Cr2Ge2Te6, we observed an increased perpendicular magnetic anisotropy and enhanced Curie temperature in the Cr2Ge2Te6/NiO heterostructure. In contrast, we report little or no change of the magnetic properties in a Cr2Ge2Te6/NiO and Cr2Ge2Te6/MgO where the Cr2Ge2Te6 was exfoliated on top of the oxide layer. Finally, strain is considered as the mechanism of the enhancement, as we observed the formation of wrinkles in thin Cr2Ge2Te6/NiO heterostructure and the Raman characteristics close to the wrinkles indicated a tensile strain, which is consistent with stronger ferromagnetism in Cr2Ge2Te6.
AB - We study the effects of interfacing the van der Waals ferromagnet Cr2Ge2Te6 with oxide layers, such as NiO and MgO, in a few different configurations. For this, the magnetic hysteresis curves, obtained by magneto optical Kerr effect, of Cr2Ge2Te6 flakes of similar thicknesses were evaluated. Compared to the properties of a bare Cr2Ge2Te6, we observed an increased perpendicular magnetic anisotropy and enhanced Curie temperature in the Cr2Ge2Te6/NiO heterostructure. In contrast, we report little or no change of the magnetic properties in a Cr2Ge2Te6/NiO and Cr2Ge2Te6/MgO where the Cr2Ge2Te6 was exfoliated on top of the oxide layer. Finally, strain is considered as the mechanism of the enhancement, as we observed the formation of wrinkles in thin Cr2Ge2Te6/NiO heterostructure and the Raman characteristics close to the wrinkles indicated a tensile strain, which is consistent with stronger ferromagnetism in Cr2Ge2Te6.
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U2 - 10.1063/9.0000413
DO - 10.1063/9.0000413
M3 - Article
AN - SCOPUS:85147255887
SN - 2158-3226
VL - 13
JO - AIP Advances
JF - AIP Advances
IS - 1
M1 - 015031
ER -