磁性材料

The fundamental conceptions and characteristics of substance magnetism such as diamagnetism, paramagnetism, ferromagnetism, ferrimagnetism and antiferromagnetism etc.

高等磁学》是磁学和磁性材料专业的主要基础课程，本课程使研究生较为全面地熟悉磁性的基础理论，材料各种磁性的基本特性和物理本质，为从事磁学理论、磁性材料和器件研究打下坚实的基础。

Magnetic material is the main pillar material of modern industry, the development of global magnetism material is very rapid.

磁性材料是现代工业的主要支柱材料，全球磁性材料的发展极为迅速。

Fe-Zr-B amorphous alloy is an important soft-magnetic material, which has important applications in preparation of transformer, magnetic recorder, electromagnetism disturbing shield and so on.

Fe-Zr-B 非晶合金是一种良好的软磁性材料，在变压器设备、磁性记录材料、电磁干扰屏蔽材料等领域有着重要的应用。

Paper in magnetic patterns, pulp to join jiseizai powder, when paper pulp and magnetic powder is closed at magnetic Board shapes implantation magnetic anti-false paper, magnetic powder be 200 screen, and it should also be stain.

在成纸中有明显的磁性图案，纸浆中加入磁性材料粉末，当纸浆和磁性粉末就按磁板图案的形状植入磁性防伪纸中，磁性粉末，应经过200目筛，并还应染色。

The review includes:(1)spintronics,(2)magnetic properties of Bi -Fe oxides,(3)rare and rare -earth metalic perpendicular magnetic recording materials,(4)new multilayer magnetic material s,(5)magnetic levitation vehicle.

综述了磁性功能材料研究和应用在2000年～2001年间的新进展，其内容包括：(1)自旋电子学；(2)Bi-Fe氧化物的磁性；(3)稀有和稀土金属垂直磁记录材料；(4)新的多层膜磁性材料；(5)磁浮列车。

Owing to the drawbacks of analytical shimming, this paper puts forward the concept of passive numerical shimming for searching a method of compensating Bz'easily to a high level and with a low cost. Based on the magnetic field caused by a magnetic moment, the distribution of moments in a superconducting NMR imaging megnet can be determined through some pseudoinversion algorithm directly from Bz'. The moments are used to compensate Bz'.

无源数值匀场的出发点直接是不均匀磁场的磁场偏差B〓本身；无源数值匀场的基础为磁性材料的磁矩所产生的磁场；由已知B〓，通过某种逆运算，确定磁性材料的磁矩在主磁体中的分布，实施此分布，以磁性材料的磁矩所产生的磁场直接对B〓进行补偿——这便是本文提出的无源数值匀场的概念。

The metal magnetic material was adopted to satisfy EMI resistance equipment in GHz frequency, due to its higher saturation magnetic susceptibility than the ferrite material, lamella structure and higher frequency in Snoek limit than that of the ferrite material.

由于金属磁性材料的饱和磁感应强度高过于铁氧体，微波段的磁导率高，有利于实现薄层化， Snoek极限值所到达的频率高过于铁氧体材料，所以可以采用金属磁性材料来满足GHz频段抗干扰器件的要求。

The method includes the following steps: depositing a non-magnetic layer (3) of sufficient thickness; anisotropically etching the non-magnetic layer to form a steep wall of suitable dimensions at the required position of a flux guide; depositing a magnetic material to form a magnetic layer (9) on the wall in such a manner that the magnetic layer has a thickness corresponding to the required track width; removing undesired deposits of magnetic material but maintaining the magnetic layer on the wall; depositing an insulating material (19a) to cover the magnetic layer.

该方法包括下列步骤：淀积足够厚度的一个非磁层(3)；非均质地蚀刻该非磁层以便在磁通引导的要求位置形成适宜尺寸的阶跃内壁；淀积一个磁性材料，以便在该内壁上形成一个磁层(9)，使得该磁层具有对应于该要求的磁迹宽度的一个厚度；去除不希望的淀积的磁性材料而保持在该内壁上的磁层；淀积一个绝缘材料(19a)以便覆盖该磁层。

The development of magnetic materials was extremely rapid during the 1990's,when magnetic alloys of the rare earth-3d iron group,such as rare earth permanent magnets,giant magnetostriction materials,giant magnetocaloric materials,magnetooptic materials,magnetic amorphous materials,and nanocrystalline magnetic materials,appeared one by one.

稀土-3d过渡族磁性合金材料，如稀土永磁、巨磁致收缩材料、巨磁热效应材料，磁光效应材料等，以及非晶，纳米微晶磁性材料相继问世。1988年巨磁电阻效应的发现已获广泛应用，如读出磁头、传感器以及磁随机存储器等，并发展成为自旋电子学的新学科。

The article considers that the magnetic material layer of MPCs is bismuth-substituted yttrium iron garnet which is ferromagnetic material, and the isotropic material layers are GGG, GaAs, SiO2, etc. Those materials have different relative permittivities.

文中所模拟的磁性光子晶体，其主要磁性层为亚铁磁性材料的渗入铋之钇铁石镏石(Yttrium Iron Garnet， YIG，)，而等向性介质则采用、GaAs等材料，其分别具有不同的相对介电常数。

I can not make it blossom and suits me

我不能让树为我开花

When temperatures are above approximately 80 °C discolouration of the raceways or rolling elements is a frequent feature.

当温度高于 80 °C 左右时，滚道或滚动元件褪色是很常见的特征。