A.C. susceptibility as a probe of low-frequency magnetic dynamics

Abstract

The experimental technique of a.c. susceptibility can be used as a probe of magnetic dynamics in a wide variety of systems. Its use is restricted to the low-frequency regime and thus is sensitive to relatively slow processes. Rather than measuring the dynamics of single spins, a.c. susceptibility can be used to probe the dynamics of collective objects, such as domain walls in ferromagnets or vortex matter in superconductors. In some frustrated systems, such as spin glasses, the complex interactions lead to substantial spectral weight of fluctuations in the low-frequency regime, and thus a.c. susceptibility can play a unique role. We review the theory underlying the technique and magnetic dynamics more generally and give applications of a.c. susceptibility to a wide variety of experimental situations.

28 pages, 15 figures (additional figures only available in published version)

References in corpus (7)

• Spontaneous Skyrmion Ground States in Magnetic Metals
• Magnetic phase diagram of MnSi inferred from magnetization and ac susceptibility
• Low Temperature Spin Freezing in Dy2Ti2O7 Spin Ice
• Magnetic Quantum Tunneling: Insights from Simple Molecule-Based Magnets
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Cited by in corpus (8)

• DFT+μ: Density Functional Theory for Muon Site Determination
• AC susceptometry of 2D van der Waals magnets enabled by the coherent control of quantum sensors
• An ac-susceptibility study of magnetic relaxation phenomena in the antiskyrmion hosting tetragonal Mn-Pt(Pd)-Sn system
• Ground State Magnetic Structure and Magnetic Field Effects in the Layered Honeycomb Antiferromagnet YbOCl
• Pinning of Helimagnetic Phase Transitions in Zn-Substituted Skyrmion Host Cu${}_2$OSeO${}_3$
• Competition between spin-glass and antiferromagnetic states in Tsai-type 1/1 and 2/1 quasicrystal approximants
• Static and dynamic magnetic properties of K3CrO4
• Environment-controlled Floquet-state paramagnetism