Dresden 2026 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 23: Correlated Electrons – Poster I
TT 23.3: Poster
Montag, 9. März 2026, 18:00–20:00, P1
Observation of spin-glass behavior in Nd — •Lorenz Pech1, Lukas Bauer1, Jiří Pospíšil4, Christoph Franz1, Leo Maximov1, Andreas Bauer1,3, Marc A. Wilde1,3, and Christian Pfleiderer1,2,3 — 1Technical University of Munich (TUM) — 2MCQST, Munich — 3TUM Center for Quantum Engineering — 4Charles University, Prague
Frustration and effective disorder in Nd are expected to produce frozen, disordered spins with slow, history-dependent dynamics [1]. We investigate the low-temperature magnetic and electronic properties of single-crystal neodymium to map its complex phase behavior and search for a spin-glass like state. To identify such phases, we combine temperature and field sweeps with ac magnetization (frequency-resolved), dc magnetization (ZFC/FC), and relaxation measurements. From anomalies in χ′(T), χ″(T), M(H), and dM/dH along principal crystallographic directions, we construct a T–B phase diagram.
Established spin glass freezing criterias are the presence of a ZFC/FC bifurcation, a frequency-dependent shift of the χ′ and χ″ peak, and slow non-exponential relaxation [2]. These benchmarks, together with more recent perspectives on complex low-temperature phases in correlated systems, provide the framework for interpreting our Nd data and distinguishing glassy behavior from conventional long-range magnetic order.
[1] Kamber, Umut et al. Science 368, eaay6757 (2020).
[2] K. Binder and A. P. Young, Rev. Mod. Phys. 58, 801 (1986).
Keywords: Nd; neodymium; spin glass; magnetization; phase diagram