Recent advances in pseudobinary iron based permanent magnets
Recent advances in pseudobinary iron based permanent magnets
复制标题
赝二元铁基永磁体的最新进展
DOI：
10.1179/imr.1995.40.4.137
复制
发表时间：
1995
影响因子：
16.1
通讯作者：
F. Cadieu
中科院分区：
文献类型：
--
作者：
F. Cadieu
直到最近才有可能制造出能量产物大于20mg De的Sm-Co基化合物的铁基类似物。这些化合物通常以伪二元化合物的形式存在，因为需要一些其他元素来帮助稳定晶体结构或改变碱化合物的各向异性。三元相Nd2Fe14B的发现是一个巨大的进步，因为它是第一个利用铁的高本禀磁化和稀土元素的大各向异性来制造非常高能量密度磁铁的铁基化合物。但相对较低的居里点促使人们继续寻找更高居里点、高各向异性的铁基化合物。最近，通过在结构中加入第三种元素，对五种铁基化合物进行了改性，从而可以合成新的高能产物，大于20mg De的铁基磁性材料。这些体系包括化合物Sm2Fe17N3-8、Sm(Fe,Ti) 12nd (Fe,Co,Ti)12N、Nd(Fe,Co,Mo)12N和Pr(Fe,Co,Mo)12N。其中四种系统通过将小原子（如N）加入到结构中来显著改变各向异性。介绍了这些新型铁基超磁体的合成进展和难点。
Only recently has it been possible to make iron based analogues to Sm-Co based compounds that exhibit energy products of greater than 20 MG De. These compounds have generally been in the form of pseudobinaries since some other element is required either to help stabilise the crystal structure or to modify the anisotropy of the base compound. The discovery of the ternary phase Nd2Fe14B was a tremendous step forward since it was the first Fe-based compound that utilised the high intrinsic magnetisation of Fe and large anisotropy of a rare earth element to allow very high energy density magnets to be made. But the relatively low Curie point prompted the continuing search for higher Curie point, high anisotropy, Fe-based compounds. Recently five Fe-based compounds have been modified through the incorporation of a third element into the structure to allow the synthesis of new high energy product, greater than 20 MG De, Fe-based magnetic materials. These systems include the compounds Sm2Fe17N3-8, Sm(Fe,Ti)12 Nd(Fe,Co,Ti)12N, Nd(Fe,Co,Mo)12N, and Pr(Fe,Co,Mo)12N. Four of these systems use the incorporation of a small atom such as N into the structure to change the anisotropy dramatically. Some of the progress and difficulties in synthesising these new Fe-based supermagnets are described.
影响因子：
3.2
作者：
SAGAWA, M;FUJIMURA, S;MATSUURA, Y
通讯作者：
MATSUURA, Y