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Magnetic properties of Bi-doped Y3Fe5O12 nanoparticles
Haitao Xu,Hua Yang,Wei Xu,Lianxiang Yu 한국물리학회 2008 Current Applied Physics Vol.8 No.1
Bi³+ substituted garnet nanoparticles Y₃. xBiχFe5O₁₂ (x = 0.0, 0.2, 0.4, 0.6, 0.8, 1.0, 1.2 and 1.3) were fabricated by a solgel methodand their crystalline structures and magnetic properties were investigated by using X-ray diraction (XRD), IR spectroscopy, thermalgravity analysisdierential thermal analysis (TG-DTA), transmission electron microscope (TEM), Mo¨ssbauer spectroscopy and vibrat-3. xBixFe5O12 have only peaks of the garnet structure.
Correcting the Elastic-modulus Error of Quartz Glass Using Digital Speckle-pattern Interferometry
Ziyang Song,Weixian Li,Sijin Wu,Lianxiang Yang 한국광학회 2023 Current Optics and Photonics Vol.7 No.4
Three-point bending is the main method for measuring the elastic modulus of a thin plate. Although various displacement transducers may be used to measure the bending, these are single-point measurements, and it is difficult to eliminate the error caused by eccentric load and shear force. Error-correction models for the elastic modulus of quartz glass using digital speckle interferometry are proposed for eccentric load and shear force. First, the positional misalignment between maximum deflection and load is analyzed, and the error caused by eccentric load is corrected. Then, the additional displacement caused by shear force at different positions of the quartz glass plate is explored. The effect of shear deformation is also corrected, by measuring two points. Since digital speckle interferometry has the advantage of full-field measurement, it can simultaneously obtain deflection data for multiple points to realize error correction. Experimental results are presented to demonstrate that the proposed model can effectively correct the measurement error of the elastic modulus.
Effect of Nd ion on the magnetic properties of Ni-Mn ferrite nanocrystal
Lijun Zhao,Wei Xu,Hua Yang,Lianxiang Yu 한국물리학회 2008 Current Applied Physics Vol.8 No.1
The nanocrystalline Ni0.7Mn 0.3Nd 0.1Fe1.9O4 ferrites were prepared by the emulsion method. X-ray diractometer (XRD), transmis-sion electron microscope (TEM), Mo¨ssbauer spectra and vibrating samples magnetometer (VSM) were used to study the structure, mor-phology and magnetic properties. The magnetic properties of Nd3+-doped Ni0.7Mn 0.3Fe2O4 nanocrystal ferrites were investigated indetail. The Ni0.7Mn 0.3Nd 0.1Fe1.9O4 nanocrystal ferrite with particle size of 10.7 nm shows superparamagnetism.