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首页> 外文会议>NATO Advanced Study Institute on Magnetic Storage Systems Beyond 2000, Jun 25-Jul 7, 2000, Rhodes, Greece >ENHANCEMENT OF MAGNETIC PROPERTIES BY Co SUBSTITUTION IN Nd_3(Fe_(1-x)Co_x)_(27.5)(x= 0, 0.1, 0.2,0.3,0.4) INTERMETALLIC COMPOUNDS
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ENHANCEMENT OF MAGNETIC PROPERTIES BY Co SUBSTITUTION IN Nd_3(Fe_(1-x)Co_x)_(27.5)(x= 0, 0.1, 0.2,0.3,0.4) INTERMETALLIC COMPOUNDS

机译：Nd_3（Fe_（1-x）Co_x）_（27.5）（x = 0，0.1，0.2,0.3,0.4）金属间化合物中Co取代对磁性的增强

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摘要

A novel series of rare earth - transition metal 3:29-type intermetallic compounds has been synthesised, with nominal stoichiometry Nd_3(Fe_(1-x)Co_x)_(27.5)Ti_(1.5) (x= 0, 0.1,0.2, 0.3, 0.4), extending the solubility limit of Co atoms in the Fe sites up to 0.4. The Nd_3(Fe,Ti)_(29)-type structure with monoclinic symmetry (space group A2/m) is dominant in all samples, with some Nd(Fe,Co,Ti)_(12) as a secondary phase and a small amount of α-Fe(Co). The unit cell volume is decreasing anisotropically as the Co content increases. The Curie temperature increases monotonically with x, from 437 to 876 K for the 3:29 phase, and from 553 to 918 K for the 1:12 secondary phase. The saturation magnetisation increases with x from 143.3 to 175.5 Am~2/kg and the anisotropy field increases from 3.7 T to 5.2 T. For x≥0.2 and at room temperature the compounds present an easy-magnetisation direction along the direction.
机译：合成了一系列新颖的稀土-过渡金属3:29型金属间化合物，其标称化学计量为Nd_3（Fe_（1-x）Co_x）_（27.5）Ti_（1.5）（x = 0，0.1,0.2， 0.3，0.4），将Co原子在Fe位点的溶解度极限扩展到0.4。具有单斜晶对称性（空间群A2 / m）的Nd_3（Fe，Ti）_（29）型结构在所有样品中均占主导地位，其中一些Nd（Fe，Co，Ti）_（12）为第二相，少量的α-Fe（Co）。随着Co含量的增加，晶胞体积各向异性地减小。居里温度随x单调增加，对于3:29相，从437 K增加到876 K，对于1:12第二相，从553 K到918K。饱和磁化强度随x从143.3 Am〜2 / kg增加到175.5 Am〜2 / kg，并且各向异性场从3.7 T增加到5.2T。对于x≥0.2且在室温下，化合物沿该方向呈现易磁化方向。

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