Hematite Spin Wave Dispersion Data at GHz Frequencies

Spin wave spectroscopy data from the natural mineral hematite (α-Fe₂O₃) reveals an ultra-low damping coefficient of 1.1×10⁻⁵ and magnon group velocities of a few 10 km/s at room temperature. The data, associated with a 2023 Physical Review Materials paper, covers a large regime of wave vectors up to k≈24 rad/μm. It was produced by researchers at École Polytechnique Fédérale de Lausanne to promote hematite as a sustainable basis for magnonic devices.

Use Cases

• Modeling spin wave dispersion relations based on the reported wave vectors and frequencies.
• Benchmarking magnetic damping coefficients in antiferromagnetic materials against the reported value of 1.1×10⁻⁵.
• Estimating magnon group velocities and decay lengths for device design based on the reported measurements.
• Comparing the performance of hematite with yttrium iron garnet (YIG) for magnonic applications.

Strengths

• Reports a specific, ultra-low magnetic damping coefficient of 1.1×10⁻⁵.
• Covers a large wave vector range up to k≈24 rad/μm.
• Data is directly associated with a peer-reviewed publication in Physical Review Materials (2023).

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count is unknown, which may limit suitability assessment.
• Description metadata is limited; actual data quality and file formats require manual inspection.

Provenance

Source

École Polytechnique Fédérale de Lausanne

Collection Method

Broadband GHz spectroscopy and inelastic light scattering measurements.