Measurement principle

Under the combined action of high-frequency microwaves and magnetic fields, the sample resonates and absorbs high-frequency microwaves near a certain magnetic field. High-frequency microwaves pass through the sample through a waveguide, and the detector monitors the change of microwave power in real time. The signal is filtered by the preamplifier and recorded by the data acquisition device, and the computer processes and stores the data. Liquid helium is used to adjust the sample temperature, and liquid nitrogen is used to cool the pulse magnet.

Fig.1. Experimental principle diagram

Measurement Conditions

Field range: 0-30 T

Temperature range: 2-300 K

Frequency range: 60-750 GHz

Sample size: as shown below

Fig.2 Measurement method and sample size

Typical Data

The facility is used to study the elementary excitations and spin dynamics of strongly correlated electronic systems, quantum magnetism and quantum phase transitions of low-dimensional and frustrated spin systems, and magnetic anisotropy of nanomolecular magnetic materials. The figure below shows the ESR spectrum of a Cr-based single-ion magnet as a function of microwave frequency.

Fig.3 ESR spectra of a Cr-based single-ion magnet [JACS 139, 12069 (2017)]

Key Contact

Zhenxing Wang

Email：zengwei.zhu#hust.edu.cn (Please replace # with @)