ENERGY AND ORIENTATION DEPENDENCE OF NEUTRON DEPOLARIZATION IN A LARGE SINGLE CRYSTAL OF FERROMAGNETIC HOLMIUM
ENERGY AND ORIENTATION DEPENDENCE OF NEUTRON DEPOLARIZATION IN A LARGE SINGLE CRYSTAL OF FERROMAGNETIC HOLMIUM
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大型铁磁钬单晶中子去极化的能量和取向依赖性
DOI：
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发表时间：
1997
期刊：
影响因子：
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通讯作者：
N. R. Roberson
中科院分区：
文献类型：
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作者：
V. Alfimenkov;A. Chernikov;L. Lason;Y. Mareev;V. Novitsky;L. B. Pikelner;V. Skoy;M. I. Tsulaya;C. Gould;D. Haase;N. R. Roberson
我们报道了在一个直径为2.0厘米的铁磁性钬圆柱单晶体的磁畴中，对超热中子（1.7 - 59电子伏特）退极化的测量结果。中子通过一个动态极化的质子靶被极化，并使用一个静态极化的稀土自旋过滤器进行极化分析。基于退极化对中子能量和晶体取向的依赖性，我们确定磁畴为层状或针状，其长轴从晶体c轴稍有偏转，平均宽度为59微米。
We report measurements of the depolarization of epithermal neutrons (1.7–59 eV) in magnetic domains of a 2.0-cm-diam cylindrical single crystal of ferromagnetic holmium. The neutrons were polarized by a dynamically polarized proton target and polarization analyzed using a statically polarized rare-earth spin filter. Based on the dependence of the depolarization on neutron energy and crystal orientation, we determined the domains to be laminar, or needlelike, with the long axis slightly deflected from the c crystalline axis and having an average width of 59 μm.