退磁

二是在c轴方向上可能存在强烈的退磁效应，而在ab平面方向上退磁效应可以忽略不计。

The other reason is that the demagnetization may exist along the c axis , which does almost not exist in the ab plane .

用X射线衍射仪、光学金相显微镜、透射电镜和扫描电镜研究了磁体的结构；用磁强自动记录仪测量了磁体的退磁曲线。

The structure of the magnet was investigated by XRD , optical microscope , TEM and SEM , and its demagnetization curve was tested by magnetograph .

影响烧结Nd-Fe-B磁体退磁曲线方形度的因素

The Factors Affecting the M-H Loop Squareness of Sintered Nd-Fe-B Magnets

对退磁曲线线性度较好的磁体，提出一种用数学方法计算磁体B＝f（H）关系和磁通损失数学表达式的方法。

The method of calculation of demagnetizing curve and magnetic flux loss based on magnets with good linearity of demagnetizing curve have been showed in this paper .

Nd-Fe-B磁体退磁曲线方形度与烧结过程的关系

Variation of the Demagnetization Curve Rectangularity of Nd-Fe-B Magnets With Sintering Process

单相Nd2Fe（14）B的热退磁及磁畴成核的随机性

Thermal demagnetization and randomness of domain nucleation of single phase nd _2fe_ ( 14 ) b

结果表明，适量Ga元素的添加能有效提高磁体退磁曲线的方形度，进而提高磁体的最大磁能积。

The results suggest that adding proper gallium could improve the squareness of the demagnetization curve and increase the maximum energy product of the magnets .

结果表明：磁饱和状态Q值最高，退磁状态Q值居中，剩磁状态Q值最低，Q值随冷变形量增加而升高。

The results show that Q value is highest in magnetic saturation state , medium in demagnetization and lowest in remanence . Also , Q value increases with the cold-forming deformation .

300MW机组发电机转子退磁方法探讨

Discussion on Demagnetization Methodology of Generator Rotors for 300 MW Units

在第一个退磁过程中的成核场和钉扎场都是负的，并且都是随着J的减小（J绝对值的增加）而减小。

Both the nucleation and pinning fields at the first demagnetization process are negative , which fall as J decreases ( the absolute value of J increases ) .

烧结Nd-Fe-B磁体的富氧表层导致在磁体的退磁曲线上表现出明显的台阶特征。

The oxygen-rich layer of Nd-Fe-B sintered magnet is responsible for the typical step of the demagnetization curve of the magnet .

在77K温度下，还观察到了退磁效应引起的磁电阻垂直各向导性。

Moreover , perpendicular anisotropy of MR was observed at 77K , which was ascribed to the demagnetizing effect .

图4显示了XFM铁氧体磁体的退磁的全过程。

Figure displays the full process of the XFM magnet demagnetization .

从退磁过程半对数曲线的斜率可以求得平均flip-flop时间。自旋扩散系数可以由此估算。

The average flip-flop time can be deduced from the slope of the semilogarithm curve of depolarization , and the spin diffusion coefficient can thus be estimated .

提出了磁聚焦器的聚焦能力可以用聚焦参数K来描述，并得到聚焦参数由材料的磁导率和器件的退磁因子决定的理论公式。

It was suggested that the feature of the concentrator can be characterized by a concentration parameter K , and a simple model is then proposed , of which K is dependent on the magnetic permeability of the material and the demagnetization factor of the device .

用SQUID磁强计测量了在不同温度一直到5T的MgB2磁滞回线，确定了下临界磁场和样品的退磁因子。

Magnetic hysteresis loops of MgB-2 up to 5T were measured at different temperatures using a SQUID magnetometer . The lower critical magnetic field and demagnetization factor are determined .

Fe-Mn-Ti合金在冷加工后于540℃左右高温回火可以得到较高的磁矫顽力。本研究用退磁曲线测量；

The cold worked Fe-Mn-Ti alloy after tempering at ~ 540 ℃ can get relatively high value of coercive force .

在磁性颗粒间通过传导电子的RKKY相互作用，发现了不像多层膜系统那样的非振荡的反铁磁性现象.由偶极相互作用的退磁效应显示出与简单超顺磁行为的偏差。

The non-oscillatory antiferromagnetic behavior which is unlike that in multilayer systems is found in the RKKY-type interaction between magnetic granules , via the conduction electrons .

在宽的温度范围内加热时，所考查的合金都表现出明显的对退磁不可逆的磁导率衰减，μi-T曲线上有明显的磁导率局域极小值（对应的温度为Tmin）。

All the investigated alloys clearly exhibit permeability decay in a wider temperature range , which is irreversible with respect to demagnetization . Curves μ 1 vs T have a local minimum value of μ I , which corresponds to a temperature rmin .

定量描述了Nd-Fe-B磁体J-H退磁曲线方形度与烧结过程的关系，分析了相对密度、晶粒尺寸及其分布对磁体J-H退磁曲线方形度的影响规律。

A quantitative description of variation of the demagnetization curve rectangularity of Nd-Fe-B magnets with sintering process and a study of the effect of relative density , grain size and its distribution on the demagnetization curve rectangularity of Nd-Fe-B magnets are presented in this paper .

通过理论计算和试验，找出厂所推荐的退磁机磁感应强度分布曲线，得出了最少退磁时间约5s和工作电流为220A的结论，并对导管的选材、推杆的加工等具体问题作了说明。

Through theoretical calculation and testing , the paper finds out the recommending magnetic inductive intensity distribution of the magnetism-eliminator , then comes to the conclusion that the least elimination magnetism time is about 5s and working current 220A .

湖北大洪山地区中、晚元古代（1350～650Ma）35个岩石样品经热退磁、SCT超导磁力仪测量，获得若干古地磁结果。

There were 35 samples of Middle & Late Proterozoic ( 1350 ~ 650Ma ) rocks from Da-hongshan area , Hubei demagnetized with thermal treatment and measured with supercon-ducting quantum interference divice ( SQUID ) and some paleomagnetism results were ob-tained .

磁体的B-H退磁曲线在500℃时保持为直线，内禀矫顽力温度系数β（25℃~500℃）为–0.16%/℃，最高使用温度达到533℃。

The B-H demagnetization curve maintained at a straight line at 500 ℃, the intrinsic coercivity coefficient β ( 25 ℃ ~ 500 ℃) was - 0.16 % / ℃, and the maximum operating temperature was up to 533 ℃ .

对磁粉探伤中MKSA有理制和高斯单位制的转换、穿棒法交流电磁化规范的确定以及两次磁化工序间的退磁问题进行了探讨。

Discussion is carried out on unit transformations between MKSA and Gaussian systems , determination of criterion for alternating current magnetization of threading bar technique and demagnetization between two magnetizing procedures in magnetic particle inspection .

热应力小于1.2GPa时所对应的速度和载荷为安全工况；温升大于373K时所对应的工况将导致磁盘退磁。

Velocity and load resulting in the maximum thermal stress smaller than 1.2 GPa is the safe operating condition for the magnetic disk , at the same condition with temperature higher than 373 K it will lead heat-induced demagnetization .

本文研究了离子代换对Li-Mg-Ti-Zn系铁氧体磁性（例如饱和磁化强度，磁晶各向异性、退磁态微波磁导率、铁磁共振线宽、矫顽力和剩磁比等）的影响。

Studied the effect of ion substitution in a Li-Mg-Ti-Zn ferrite system on magnetic properties , such as saturation magnetization , magnetocrystalline anisotropy , the real part of microwave permeability in the completely demagnetized state , ferromagnetic resonance line width , coercive force and magnetic remanence ratio etc.

高矫顽力永磁材料强场退磁源的研究

A Study on the Strong-Magnetic-Field Demagnetizing Device for High-Coercivity Permanent Magnets

磁性超晶格中静磁波的表面退磁效应

Effects of Surface Demagnetizing Field for Magnetostatic Waves in Magnetic Superlattices

测量用电流互感器的退磁及现场测试

Talking about the Demagnetization and Field Test of Measuring Current Transformer

稀土永磁材料退磁曲线的计算及应用

Calculation of Demagnetizing Curve of Rare Earth Permanent Magnets and its applications