Cantilever torque magnetometry on coordination compounds: from theory to experiments

Abstract

Cantilever Torque Magnetometry (CTM) is one of the leading techniques to deeply understand magnetic anisotropy of coordination compounds. The knowledge of magnetic anisotropy is a mandatory requirement before proceeding with any future application related to the magnetic properties of coordination compounds, such as quantum computation or information storage. This review enlightens that CTM offers a unique combination of accuracy and precision to disentangle noncollinear contributions inside Single Crystals as well as the sensitivity to detect molecular order of thin films. CTM can also detect quantum phenomena such as magnetization steps and molecular hysteresis curves. Moreover, it can also provide the energy levels splitting and wavefunctions composition, especially if coupled with microwave radiation.

Chemical tunnel-splitting-engineering in a dysprosium-based molecular nanomagnet

“…Single crystal cantilever torque magnetometry measurements on 2Dy (Supplementary Figs 8 – 10 ) provide further validation of our CF model, especially the nature of the ground doublet 42 . Indeed, the torque simulated from the CF parameters given in Table 1 perfectly reproduces the experimental data at low temperatures (Fig.…”

A Pseudo‐Octahedral Cobalt(II) Complex with Bispyrazolylpyridine Ligands Acting as a Zero‐Field Single‐Molecule Magnet with Easy Axis Anisotropy

“…[36,37] The measured torque is thus given by Equation (2): [36,37] The measured torque is thus given by Equation (2):…”

“…[37] The measurements, performed at 10 Ku nder as tatic magnetic field of 2 and 4Tand at 100 Kw ith am agnetic fieldo f1 0a nd 12 T, are reportedi nF igure3,w hereas the data at intermediate temperatures are available in Figure S2 (see the Supporting Information). The principal directions of the anisotropy tensor,s eparated by p/2 but arbitrarily located in the a*c plane,a re easily detecteda sz ero-torque points.…”

A cantilever torque magnetometry method for the measurement of Hall conductivity of highly resistive samples

“…Cantilever torque magnetometry utilizes a high-Q resonator to detect the interaction between a magnetic dipole and an external magnetic field [15][16][17]. The angular response θ of a cantilever with moment of inertia A, resonant frequency ω 0 = 2π f 0 , and quality factor Q subject to an external torque τ may be approximated as a damped harmonic oscillator following [18] Aθ + QAω 0θ + Aω 2 0 θ = τ.…”