Functional nuclear magnetic resonance ( NMR) was used to study the effect of NMR state diagram and transition point temperature ( Tp) on Maillard reaction rate in model food systems. 因此,核磁共振状态图对于评估最佳的储藏温度,以及通过配方设计来延长食品的货价期具有指导意义。
The electric transport and magnetic properties of the samples indicate that the samples have a magnetic transition temperature at~ 316 K, and exhibit a low field magnetoresistance effect from room temperature to low temperature. 对样品的电磁输运性质测量表明,在约316K处出现顺磁到铁磁的转变,并且样品从室温到低温的一个很宽的温区出现了低场磁电阻效应。
The dynamic magnetic transition was investigated by EPR experiment near the ( Curie) temperature T_c, and the results are in agreement with the magnetization experiments. 电子顺磁共振实验可以观测到样品在磁有序转变温度(Tc)附近的动态磁性相转变,并且与磁化强度的实验结果一致。
The dielectric anomaly at the magnetic transition temperature observed in experiment is indicative of the inherent magnetoelectric coupling in magnetic ferroelectrics. 实验上观察到介电常数在磁相变温度处的突变异常也就成为本征磁电耦合效应存在的标志。
The temperature dependence of resistance presents a smooth metal-insulator transition far below the magnetic transition, and the MR monotonically increases with decreasing temperature under 8 kOe field, both of which are related to the structural defects in the films including grain boundaries and porosity. 薄膜的电阻-温度关系具有平缓的金属-绝缘体转变,转变温度远低于其居里温度;在8kOe磁场下,薄膜的磁电阻随温度下降而单调上升。
Magnetic field induced entropy change was investigated for La-Fe based NaZn_ ( 13)-type compounds with magnetic first-order phase transition. In view of magnetic refrigeration at room temperature, the developing of the materials and the understanding of the entropy change were reviewed. 围绕具有一级磁性相变的La-Fe基NaZn13型化合物的磁场诱导熵变研究,从室温磁制冷目的出发讨论了材料研究和熵变机制。
Thereinto, the magnetic particles can not only improve the mechanical stresses of carbon microspheres, but also play a role of catalyst for the phase transformation from amorphous carbon to graphite, and the transition temperature was reduced dramatically. 磁性粒子的存在不但增强了碳微球的机械强度,而且也对无定形碳向石墨碳的转化起到催化作用,大大降低了石墨化温度。
The model also simulates electrical transport behavior of sample when applied magnetic field and the result shows that I-M transition moves to high temperature and resistance near Tc falls sharply because of field. 利用所建立的模型,对外加磁场下的电子输运行为也进行了模拟。结果表明,外加磁场使得I-M转变移向高温且转变附近电阻大幅度下降,从而导致TC,H附近出现CMR现象。
Even though the magnetic transition point and the coupling temperature are both low, our work provides the foundation and a paradigm for the search of room-temperature multiferroics with strong magnetoelectric coupling. 虽然Ca3Mn2O7的磁转变温度与磁电耦合温度都很低,但该工作为寻找室温下的强磁电耦合材料提供了基础和范例。
Calculated results showed that both the entropy change and the adiabatic temperature change show the maximum near the magnetic phase transition temperature, which is in good agreement with the experimental results. 2. 研究表明磁熵变化及绝热温度差都在磁相变温度附近具有最大值,我们的理论研究结果很好地解释了实验现象。