Relationship between Effective Work Functions and Noise Powers of Emission Currents in Nickel-Deposited Field Emitters
Relationship between Effective Work Functions and Noise Powers of Emission Currents in Nickel-Deposited Field Emitters
复制标题
镍沉积场发射体的有效功函数与发射电流噪声功率之间的关系
DOI：
10.1143/jjap.35.l1297
复制
发表时间：
1996
影响因子：
1.5
通讯作者：
J. Ishikawa
中科院分区：
文献类型：
--
作者：
Y. Gotoh;M. Nagao;M. Matsubara;Kazunori Inoue;H. Tsuji;J. Ishikawa
镍沉积场致发射体中的低频电流波动用归一化噪声功率进行定量评估，所述归一化噪声功率通过对0.2和2 Hz的频率之间的电流波动的谱密度进行积分而获得。将发射极和集电极之间的距离调整为1.5 μm，以实现类似于真空微电子器件的电极间距。在超高真空环境下进行测量。得到的噪声功率进行了分析与Seppen-Katamuki图，这表明有效的功函数和顶点半径的发射器。结果发现，具有较高的有效功函数的发射器显示出较高的噪声功率。从Fowler-Nordheim方程的微分出发，定性地解释了上述结果。
Low-frequency current fluctuations in nickel-deposited field emitters were evaluated quantitatively with normalized noise power which was obtained by integrating the spectral density of the current fluctuation between the frequencies of 0.2 and 2 Hz. The distance between the emitter and the collector was adjusted to 1.5 µm, in order to realize an electrode spacing similar to those of vacuum microelectronics devices. Measurements were performed under an ultrahigh-vacuum environment. The obtained noise powers were analyzed with the Seppen-Katamuki chart which indicates the effective work function and apex radius of the emitter. It was found that the emitters with higher effective work functions showed higher noise powers. The results were explained qualitatively from the differential of the Fowler-Nordheim equation.