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MA: Fachverband Magnetismus

MA 34: Molecular Magnetism

MA 34.4: Vortrag

Donnerstag, 20. März 2025, 10:15–10:30, H18

Approximate finite-temperature Lanczos modelling of dysprosium containing magnetic molecules — •Jürgen Schnack and Dennis Westerbeck — Bielefeld University, Faculty of Physics, 33615 Bielefeld

Dysprosium containing magnetic molecules are considered promissing building blocks of future quantum technology such as storage, quantum computing, quantum sensing, or magnetocalorics. The initial physical characterization includes measurements of magnetization or heat capacity as function of temperature and applied magnetic field.

A theoretical modelling of an approximate quantum spin model by means of exact diagonalization of multicenter systems is virtually impossible due to the large magnetic moment of dysprosium. We resort to the finite temperature Lanczos method which however converges rather slowly [1]. We explain the reasons, our solutions and results for recent Dy containing molecules [2].

[1] O. Hanebaum and J. Schnack, Eur. Phys. J. B, 87, 194, 2014.

[2] D. Westerbeck, Ph.D. thesis, Bielefeld University, 2025, in preparation.

Keywords: dysprosium; finite-temperature Lanczos method; anisotropic spin model