一种基于磁光技术的可变光衰减器

光可变衰减器（VOA）作为波分复用（WDM）网络中关键的功率管理器件，能够实现信道均衡和自动增益控制功能。本文在分析了法拉第旋光现象和光偏振现象的基础上，进一步介绍了一种基于磁光技术实现的可变光衰减器，这种可变光衰减器具有功耗低、动态范围大、分辨精度高、响应速度快、无调节振荡、可靠性高等优点，是最具吸引力的可变光衰减技术之一。     

基于InSb-In薄膜磁阻元件电流传感器的应用

介绍了一种用InSb-In共晶体薄膜磁阻元件制成的电流传感器（MRCS）。为了检测微弱电流，此种电流传感器利用同时改变两个InSb-In磁阻元件阻值的途径来实现这一目的，设计了一种能较大幅度增大其输出电压的信号处理电路。当处理电路的电压增益为50-10000倍、，待测的50Hz交流电流在50mA-12A时，输出电压在0.3-3.5V变化，并且两者之间有比较好的线性关系，标准偏差小于0.02，完全能满足工业上对电流的监测作用，从而保护因异常情况停止运转的马达。     

码垛区翻转电磁头的动力学分析

对小型型钢轧制生产线码垛区设立的翻转电磁头平面四连杆机构,作出简化模型,进行驱动力矩和运动速度的计算分析,并且作图直观显示速度变化情况,分析结果符合现场使用要求.     

2001～2002年磁记录材料及应用新进展

从 1999年开始每年撰写国内外磁记录材料及其应用的新进展。这里论述 2 0 0 1～ 2 0 0 2年的新进展 ,内容包括 :(1)垂直磁记录 ;(2 )平行磁记录 ;(3)多层膜巨磁电阻材料 ;(4 )磁层间的相互作用对磁记录介质的影响 ;(5 )纳米膜磁记录材料。     

软磁薄带巨磁阻抗效应的数值分析

利用磁畴壁移动模型以纳米晶软磁合金Ｆｅ７３．５Ｃｕ１Ｎｂ３Ｓｉ１３．５Ｂ９为例对软磁薄带中的巨磁阻抗效应进行了数值分析，结果发现不同的磁导率机制并不能显著发迹巨巨磁阻抗效的大小仅由磁导率对外加磁场的敏感性决定，从趋肤深度的角度讨论了巨磁阻抗效应的频率特性。     

两种成分制备态纤维和薄带的巨磁阻抗效应

用熔融抽拉法制备了Co68.25Fe4.5Si12.25B15和Fe72Co8Si5B15两种成分的非晶合金纤维材料。对两种成分制备态纤维和薄带的磁阻抗进行了频谱分析,表明制备态Co68.25Fe4.5Si12.25B15非晶纤维的GMI(Z)=|(Z(H)-Z(20Oe))／Z(20Oe)|高达438.5％,接近国外报导的最大值。分析了磁阻抗中电阻、电感分量随频率的变化,表明电阻的变化对维持高的GMI起主要作用。     

Magnetic Field‐Enhanced Thermoelectric Performance in Dirac Semimetal Cd3As2 Crystals with Different Carrier Concentrations

The magneto‐thermoelectric figure of merit (ZT) in crystals of the topological Dirac semimetal Cd₃As₂ with different carrier concentrations is studied. The ZTs for all the crystals increase with the temperature and show maxima at high temperatures. Meanwhile, the temperatures corresponding to the ZT maxima increase with the carrier concentration. The limit to the improvement in ZT(T) at high temperature could be related to the unusual large enhancement in thermal conductivity at elevated temperatures. The bipolar effect and Dirac liquid behavior are presented as processes possibly responsible for the peculiar behavior of the thermal conductivity. Applying a transverse magnetic field initially leads to a dramatic enhancement and, subsequently, to a slight reduction in ZT for all the crystals. The maximum ZT achieved in a magnetic field increases with the carrier concentration and reaches 1.24 at 450 K in a magnetic field of 9 T for the crystal with the highest carrier concentration. It is expected that this work will be beneficial to the current interests in optimizing the thermoelectric properties of quantum topological materials.     

Janus Magnetic‐Plasmonic Nanoparticles for Magnetically Guided and Thermally Activated Cancer Therapy

Progress of thermal tumor therapies and their translation into clinical practice are limited by insufficient nanoparticle concentration to release therapeutic heating at the tumor site after systemic administration. Herein, the use of Janus magneto‐plasmonic nanoparticles, made of gold nanostars and iron oxide nanospheres, as efficient therapeutic nanoheaters whose on‐site delivery can be improved by magnetic targeting, is proposed. Single and combined magneto‐ and photo‐thermal heating properties of Janus nanoparticles render them as compelling heating elements, depending on the nanoparticle dose, magnetic lobe size, and milieu conditions. In cancer cells, a much more effective effect is observed for photothermia compared to magnetic hyperthermia, while combination of the two modalities into a magneto‐photothermal treatment results in a synergistic cytotoxic effect in vitro. The high potential of the Janus nanoparticles for magnetic guiding confirms them to be excellent nanostructures for in vivo magnetically enhanced photothermal therapy, leading to efficient tumor growth inhibition.     

多层旋磁介质材料中的耦合法拉第效应

基于磁介质听传输短的边界矩阵处理方法,建立了多层旋磁介质材料耦合法拉第角计算模型,分析了ＢｉＤｙＩＧ多层石榴石旋磁薄法拉第角频谱、结果表明分层「Ｂｉ：ＤｙＩＧ／Ａｌ」材料在３００－５８０ｎｍ波长范围具有中的法拉第效应,这有有利于短波高密度磁光记录和微波法拉第器件性能改善。