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Anisotropic Gigahertz Antiferromagnetic Resonances of the Easy-Axis van der Waals Antiferromagnet CrSBr
Nano Letters ( IF 10.8 ) Pub Date : 2022-08-04 , DOI: 10.1021/acs.nanolett.2c02124 Thow Min Jerald Cham 1 , Saba Karimeddiny 1 , Avalon H Dismukes 2 , Xavier Roy 2 , Daniel C Ralph 1, 3 , Yunqiu Kelly Luo 1, 3, 4
Nano Letters ( IF 10.8 ) Pub Date : 2022-08-04 , DOI: 10.1021/acs.nanolett.2c02124 Thow Min Jerald Cham 1 , Saba Karimeddiny 1 , Avalon H Dismukes 2 , Xavier Roy 2 , Daniel C Ralph 1, 3 , Yunqiu Kelly Luo 1, 3, 4
Affiliation
We report measurements of antiferromagnetic resonances in the van der Waals easy-axis antiferromagnet CrSBr. The interlayer exchange field and magnetocrystalline anisotropy fields are comparable to laboratory magnetic fields, allowing a rich variety of gigahertz-frequency dynamical modes to be accessed. By mapping the resonance frequencies as a function of the magnitude and angle of applied magnetic field, we identify the different regimes of antiferromagnetic dynamics. The spectra show good agreement with a Landau–Lifshitz model for two antiferromagnetically coupled sublattices, accounting for interlayer exchange and triaxial magnetic anisotropy. Fits allow us to quantify the parameters governing the magnetic dynamics: At 5 K, the interlayer exchange field is μ0HE = 0.395(2) T, and the hard and intermediate-axis anisotropy parameters are μ0Hc = 1.30(2) T and μ0Ha = 0.383(7) T. The existence of within-plane anisotropy makes it possible to control the degree of hybridization between the antiferromagnetic resonances using an in-plane magnetic field.
中文翻译:
易轴范德华反铁磁体 CrSBr 的各向异性千兆赫反铁磁共振
我们报告了范德华易轴反铁磁体 CrSBr 中反铁磁共振的测量结果。层间交换场和磁晶各向异性场与实验室磁场相当,可以访问各种千兆赫频率的动态模式。通过将共振频率映射为所施加磁场的大小和角度的函数,我们确定了反铁磁动力学的不同状态。光谱与两个反铁磁耦合子晶格的 Landau-Lifshitz 模型非常吻合,说明了层间交换和三轴磁各向异性。拟合允许我们量化控制磁动力学的参数:在 5 K 时,层间交换场为 μ 0 H E= 0.395(2) T,硬轴和中间轴各向异性参数为 μ 0 H c = 1.30(2) T 和 μ 0 H a = 0.383(7) T。面内各向异性的存在使得可以使用面内磁场控制反铁磁共振之间的杂交程度。
更新日期:2022-08-04
中文翻译:
易轴范德华反铁磁体 CrSBr 的各向异性千兆赫反铁磁共振
我们报告了范德华易轴反铁磁体 CrSBr 中反铁磁共振的测量结果。层间交换场和磁晶各向异性场与实验室磁场相当,可以访问各种千兆赫频率的动态模式。通过将共振频率映射为所施加磁场的大小和角度的函数,我们确定了反铁磁动力学的不同状态。光谱与两个反铁磁耦合子晶格的 Landau-Lifshitz 模型非常吻合,说明了层间交换和三轴磁各向异性。拟合允许我们量化控制磁动力学的参数:在 5 K 时,层间交换场为 μ 0 H E= 0.395(2) T,硬轴和中间轴各向异性参数为 μ 0 H c = 1.30(2) T 和 μ 0 H a = 0.383(7) T。面内各向异性的存在使得可以使用面内磁场控制反铁磁共振之间的杂交程度。