In the last issue, we introduced some of the measurement applications of PPMS, and presented the various functional options of PPMS based on the main cavity. On the road of magnetic exploration and cooperation for decades, this part of the function has been absolutely Most scientists in the field of magnetoelectric research have given great support. However, Quantum Design has not stopped here. Based on the basic needs of customers, we are constantly breaking the test limits, improving the versatility, flexibility and stability of the test platform, and recently launched more series of expansion functions. Option. Quantum Design recently launched a number of microscopy and spectroscopy components that can work on the PPMS platform in conjunction with the German company Attocube, covering high-precision measurements in various fields such as surface topography, magnetoelectrics, optics, etc. Measurement of the morphology and surface microstructure of various measurement modes (such as atomic force AFM, magnetic force microscope MFM, scanning Hall probe microscope SHPM, confocal microscope CFM, etc.) in a variable temperature and variable magnetic field environment, for example: 1. Imaging magnetic domains Figure 1 Magnetic domain measurement results, the sample is NiFe film. Measuring temperature 300K, probe to sample spacing is 20nm, dual-pass scanning mode, spatial resolution is 10.7nm 2. Change of BSCCO flux with magnetic field B and temperature T Figure 2 When the magnetic field strength changes from -40 Oe to +50 Oe, the magnetic flux reverses. Figure 3 Increase the sample temperature and the flux structure disappears 3, BaFeO low temperature measurement Figure 4 SHPM has the advantage of quantitative measurement, no need to touch the sample surface and higher sensitivity than MFM Measurement parameters: Hall current: 10 μA; scanning range: 30 μm Sample to probe distance: 350 nm; magnetic field resolution: 0.19 mT 4, iron oxide film piezoelectric microscope measurement Sample: Layered Heterojunction (150nm BiFeO3-Mn / 35nm SrRuO3 / SrTiO3 (001) Substrate) Measuring temperature: 82K Pressure power amplitude image (Figure 5a) Piezoelectric power phase image (Fig. 5b, piezoelectric domain direction is 0° and 180°) In Figure 5, there are two squares (positive and rotating) written with +/-15V respectively. As can be seen from the amplitude map, in the domain wall region, the amplitude is zero. Figure 6 Hysteresis loop, measuring temperature 82K; left and right phase and amplitude signals 5. Flux measurement in MFM mode Figure 7 PPMS users at Fudan University - 4K and 45Gs in MFM mode to detect iron-based superconducting sample flux At present, the PPMS platform to build attocube optical options has been in Fudan University, China University of Science and Technology, the Institute of Physics and other users, to meet the different testing needs of different users. While seeking external cooperation, Quantum Design is constantly breaking through itself, innovating, and gradually improving the testing platform. Including the temperature control part, magnet cooling method and magnetic field size, circuit part upgrade, and the use and recovery of helium, and achieved good results (from the first generation of Grand Duva, EC-I to the second generation of reliquefier, EC-II is now the latest generation of DynaCool), and is also working on more powerful options (such as the ETO option for MPMS3), hoping that these options will bring higher research to researchers. Precision and greater convenience. If you are interested in the above options, or if you want to know more PPMS features and application cases, please call us and we will give you a satisfactory answer as soon as possible! Fly Masks ,Horse Fly Veil,Horse Fly Masks,Horse Fly Bonnets And Veils NINGBO BRIGHT MAX CO., LTD. , https://www.brightmax-equine.com
