Probing the Anisotropic Magnetic Behavior of Quantum Magnets with Torque Magnetometry on a PPMS

This paper presents experimental investigations of the anisotropic magnetic properties of quantum magnets through torque magnetometry at low temperatures. Torque magnetometry is a sensitive and effective technique to investigate the angular dependent properties of magnetic materials. The focus of this study was to measure the torque experienced by LiCuVO4 as a function of the angle against the applied magnetic field at three distinct, low temperatures: 1.7K, 5K, and 10K. These measurements were analyzed by taking the first and second derivatives of the initial plot and using Fast Fourier Transforms (FFTs). The FFTs were used to identify periodicities in the raw torque data as well as in the first and second derivatives.

LiCuVO4 is a low-dimensional antiferromagnetic material with magnetic properties, which makes this an ideal sample for a study of this sort. This compound has a complex magnetic ordering which can be further elucidated by measuring the torque exerted on it in various conditions. For this study, torque magnetometry is a critical tool for characterizing the angular dependence of the magnetic anisotropy, which allows this study to contribute to the broader understanding of low-temperature magnetism, especially in materials that exhibit magnetic frustration or low-dimensional magnetism, as seen in LiCuVO4.

LiCuVO4 has been the subject of research due to its low-dimensional magnetic properties and its unusual ordering of its magnetic moments at low temperatures. Specifically, the material exhibits a form of magnetic frustration, where competing interactions prevent the system from settling into a conventional magnetic order, which leads to a complex ground state. Torque magnetometry is an ideal measurement tool in investigating materials of this nature as it has the ability to reveal the angular dependence of the magnetic response, as well as provide direct measurements of the magnetic anisotropy.