Elastic and magnetoelastic properties of TbMnO3 single crystal by nanosecond time resolved acoustics and first-principles calculations

Time resolved pump and probe acoustics and first-principles calculations were employed to assess elastic properties of the TbMnO3 perovskite manganite having orthorhombic symmetry. Measuring sound velocities of bulk longitudinal and shear acoustic waves propagating along at least two different directions in the high symmetry planes (100), (010) and (001), provided a powerful mean to selectively determine the six diagonal elastic constants C (11) = 227 GPa, C (22) = 349 GPa, C (33) = 274 GPa, C (44) = 71 GPa, C (55) = 57 GPa, C (66) = 62 GPa. Among the three remaining off-diagonal ones, C (23) = 103 GPa was determined with a bissectrice direction. Density functional theory calculations with colinear spin-polarized provided complementary insights on their optical, elastic and magnetoelastic properties.

Automated summary

Research on the elastic properties of TbMnO3 perovskite manganite with orthorhombic symmetry was conducted using time resolved pump and probe acoustics and first-principles calculations. Measurements of sound velocities and density functional theory calculations provided insights on the elastic constants of the material.