论文标题
大磁场引起的烧结铬菌株
Large Magnetic-Field-Induced Strains in Sintered Chromium Tellurides
论文作者
论文摘要
发现CR3TE4和CR2TE3的烧结样品显示出较大的应变，并在磁场下伴随着大体积的变化。在CR3TE4中，通过应用9 t的磁场在350 K以下的整个温度范围内观察到9 t的磁场，体积增加为500-1170ppm。在室温下，deltav/v值超过1000 ppm，这比远高于CR的最大值与CR可比的最大值相当大，并且与室友的最大值相比均大于室友的室 - 乘客值，这是室友价值的。当在200 K处应用9 T的磁场时，CR2TE3的大deltav/v均为680 ppm。这两个样品在居里温度周围表现出特别大的体积，在库里温度周围也显示出由于微结构效应而导致的负热膨胀，这表明与磁性变化相关的各种磁性变化是对巨大的表现效应 - 对磁性效应而言，这是对磁性效应的巨大效果。
Sintered samples of Cr3Te4 and Cr2Te3 are found to show large strains accompanied by large volume changes under a magnetic field. In Cr3Te4, volume increases of deltaV/V = 500-1170 ppm by applying a magnetic field of 9 T are observed over the entire temperature range below 350 K. At room temperature, the deltaV/V value exceeds 1000 ppm, which is considerably larger than the maximum values reported for Cr-based magnets thus far and is comparable to the room-temperature value of forced-volume magnetostriction in invar alloys. Cr2Te3 show a large deltaV/V of 680 ppm when applying a magnetic field of 9 T at 200 K. Both samples display particularly large volume increases around the Curie temperature, where they also show negative thermal expansion due to microstructural effects, suggesting that the cooperation between anisotropic lattice deformation associated with the magnetic ordering and microstructural effects is essential for the manifestation of the large magnetic-field-induced volume changes.
