首页> 外文OA文献 >Formation of uniform magnetic structures and epitaxial hydride phases in Nd/Pr superlattices
【2h】

Formation of uniform magnetic structures and epitaxial hydride phases in Nd/Pr superlattices

机译:Nd / Pr超晶格中均匀磁性结构和外延氢化物相的形成

代理获取
本网站仅为用户提供外文OA文献查询和代理获取服务,本网站没有原文。下单后我们将采用程序或人工为您竭诚获取高质量的原文,但由于OA文献来源多样且变更频繁,仍可能出现获取不到、文献不完整或与标题不符等情况,如果获取不到我们将提供退款服务。请知悉。

摘要

The chemical and magnetic structures of neodymium/praseodymium superlattices grown by molecular-beam epitaxy have been determined using x-ray and neutron-diffraction techniques. The x-ray measurements show that the superlattices have a dhcp structure of high crystalline quality, and that the stacking sequence is coherent over many bilayer repeats. The neutron measurements show that for the hexagonal sites of the dhcp structure, the Nd magnetic order propagates coherently through the Pr, whereas the order on the cubic sites is either suppressed or confined to single Nd blocks. It is also shown that the singlet ground state of Pr is perturbed to produce a local moment on the hexagonal sites, so that in some cases there is a uniform magnetic structure throughout the superlattice. These results cast new light on the theory of magnetic interactions in rare-earth superlattices. Within a few months of growth these light rare-earth samples are found to react with hydrogen to form new single-crystal phases, which are coherent with the epitaxial structure.
机译:通过X射线和中子衍射技术已经确定了通过分子束外延生长的钕/ super超晶格的化学和磁性结构。 X射线测量表明,超晶格具有高晶体质量的dhcp结构,并且堆积顺序在许多双层重复序列上是连贯的。中子测量结果表明,对于dhcp结构的六边形部位,Nd磁阶通过Pr进行相干传播,而立方部位的阶被抑制或限制为单个Nd块。还表明,Pr的单线基态被扰动以在六角形位置上产生局部力矩,因此在某些情况下,整个超晶格具有均匀的磁性结构。这些结果为稀土超晶格中的磁性相互作用理论提供了新的思路。在生长的几个月内,发现这些轻稀土样品会与氢发生反应,形成新的单晶相,并与外延结构保持一致。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号