Magnetic properties of oxide glasses containing iron and rare-earth ions
Magnetic properties of oxide glasses containing iron and rare-earth ions
复制标题
含铁和稀土离子的氧化物玻璃的磁性
DOI：
10.1103/physrevb.84.144408
复制
发表时间：
2011
影响因子：
3.7
通讯作者：
K.
中科院分区：
文献类型：
--
作者：
H.Akamatsu;J.Kawabata;K.Fujita;S.Murai;K.
本文对高浓度铁和稀土离子（Gd，Tb）的铝硼酸盐玻璃的基本磁性能，包括直流磁化率和交流磁化率，以及磁老化效应进行了测量，以便深入了解含有3过渡金属和4稀土离子的非晶氧化物的磁结构和相互作用，它们表现出彼此不同的磁相互作用。我们证明了铁和稀土离子之间的反铁磁相互作用以及铁离子之间的反铁磁相互作用对它们的磁性起着重要的作用，而稀土离子之间的反铁磁相互作用则不太重要。大多数稀土离子在铁离子的自旋玻璃冻结所引起的强分子场作用下，即使在自旋冻结温度以下也保持顺磁性，如稀土石榴石铁氧体。
Measurements of fundamental magnetic properties including not only dc and ac susceptibilities but also magnetic aging effects have been performed for aluminoborate glasses with high concentrations of iron and rare-earthions (, Gd, and Tb) in order to give an insight into the magnetic structures and interactions in amorphous oxides containing both 3transition metal and 4rare-earth ions, which manifest magnetic interactions that differ from each other. We demonstrate that the antiferromagnetic interactions between iron and rare-earth ions as well as those between iron ions play a significant role for their magnetic properties, while those between rare-earth ions are of little importance. Most of the rare-earth ions remain paramagnetic even below the spin-freezing temperatures under the strong molecular field caused by the spin-glass freezing of the iron ions, as in the case of rare-earth garnet ferrites.