Electron field emission from ferromagnetic europium sulfide on tungsten
Electron field emission from ferromagnetic europium sulfide on tungsten
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钨上铁磁硫化铕的电子场发射
DOI：
10.1103/physrevb.18.2256
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发表时间：
1978
影响因子：
3.7
通讯作者：
B. Reihl
中科院分区：
文献类型：
--
作者：
E. Kisker;G. Baum;A. Mahan;W. Raith;B. Reihl
在不同退火条件下，采用发射电流、自旋极化、能量分布和能量选择性自旋极化随发射体温度的变化等实验方法，研究了W-EuS结场发射体的发射过程。结果表明：通过临界退火可以得到化学计量的结晶EuS层；这种层在钨上的界面在低于eu居里温度下起自旋过滤器的作用。在高温下对发射体进行退火，获得了电子俘获和自旋团簇形成的证据。
The emission process from W-EuS junction field emitters was studied by combination of several experimental methods: measurement of emission current, spin polarization, energy distribution, and energy-selective spin polarization as function of emitter temperature for different annealing conditions. The results show that with critical annealing a stoichiometric crystalline EuS layer can be obtained; the interface of such a layer on tungsten acts as a spin filter below the EuS Curie temperature. With emitters annealed at higher temperatures, evidence for electron trapping and the formation of spin clusters has been obtained.