The disassembly operation of 200mw laser pointer should be performed carefully

Piezoelectric effect of the 1970s, the Netherlands, Philips laboratory ferroelectrics and ferromagnets the magnetostrictive effect, the compound effect of the ferromagnetic phase CoFe2O4 ferroelectric BaTiO3 mixed eutectic in situ system had a first ferroelectric - ferromagnetic composite materials (magnetic conversion coefficient of dE / dH is the value 163mV/cm.Oe). Its Curie temperature is far greater than room temperature. However, for the purposes of this 0-3 composite magnetic materials, due to the two-phase (ferroelectric and ferromagnetic phase) in the sintering process prone to solid-phase reaction and two-phase content is difficult to control (ferromagnetic phase component too much, the ferromagnetic phase particle contact conductance through difficult polarization; too little of the ferromagnetic phase component, the magnetostrictive effect is not obvious). The disassembly operation of 200mw laser pointer should be performed carefully.
Therefore, the magnetic response is up to less than the actual device applications. 2001, Ryu et al reported Tb0.27-0.30Dy0.73-0.70Fe1.90-1.95 (Terfenol-D) and PZT ceramic sandwich structure, its magnetic power coefficient to reach 10300 mV / cm.Oe, much higher than the all of the known single-phase or 0-3 composite magnetic material, and the Curie temperature is far greater than room temperature, magnetic materials, the most promising practical application of magnetic material, thus becoming the last two years of study hot spots, the U.S. military has invested heavily in research of this new high-performance magnetic composite materials and devices. Such complex ways to produce the effect of the magnetic magnetostrictive and piezoelectric composite. The effect of laser light of  green laser pointer  is irradiating the laser beam.
When the applied alternating magnetic field, due to the magnetostrictive effect, magnetostriction meet to produce a strain (stress) the stress transfer to the piezoelectric phase, due to the piezoelectric effect, induced charge at both ends of the piezoelectric layer in order to achieve the magnetoelectric effect. To achieve effective magnetic translation, must meet the following two basic conditions: First, the magnetostrictive layer excellent magnetostrictive properties of the piezoelectric layer has excellent piezoelectric properties and electromechanical coupling coefficient, two layers of between bonding and coupling must be good. It is because of these two Terfenol-D and relaxor ferroelectric single crystals (1-x) Pb (Mg1/3Nb2/3)-xPbTiO3 (PMNT) It is recognized that the most promising used to achieve the optimum magnetic composite of two basic materials. The weekly report of  green laser pointer is one of the most important jobs.
PMNT crystals is a new type of ultra-high performance piezoelectric materials, piezoelectric constant d33 of 2000pC / N; d15 can is reach 6000pC / N; electromechanical coupling factor k33 can reach more than 90%. Terfenol-D (TbxDy1-xFe2-y) is the most excellent magnetostrictive material, the commercialization of the magnetostriction coefficient of up to 1500-3000ppm, the electromechanical coupling coefficient of 75%. Therefore, Terfenol-D/PMNT composite magnetic materials is one of the most promising for practical application of ultra-high-performance magnetic materials, and foreign countries have a preliminary study results show that the Terfenol-D/PMNT composite materials with excellent magnetic properties. The customer can choose the hot-sell green laser pointer .
Magnetoelectric coefficient aE 10.3V/cm.Oe, other than the 0-3 composite or single-phase magnetic materials increased by 80 times; and it has a high magnetic field sensitivity (resolution up to 10-11-10 -12T). Some people have reported great future in the transformer, and experimental results show that the maximum transformer ratio (input and output voltage) can be up to 300. This is ideal for field operation requires high-pressure occasions. This compound produced by the magnetic sensors are expected than the conventional magnetic detector accuracy to improve a lot (at least 5-6 times), and light weight, small size, wide detection range, high sensitivity. The customer needs more discount for the product of green laser pointer .