Effect on nonlinearities in Hall measurement in liquid states

对液态霍尔测量非线性的影响

• 批准号: 05650012
• 负责人: OGITA Masami
• 金额: $ 1.34万
• 依托单位: Shizuoka University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (C)
• 财政年份: 1993
• 资助国家: 日本
• 起止时间: 1993 至 1994
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-05650012/
• 关键词: Hall effect; Two-frequency ac method; Ac-dc method; Nonlinearity; Liquid state; Liquid metal; Magnetoresistance; 電気伝導; 擬似信号; ac-dc法

The Project has been developed for the investigation of Hall effect in the liquid state ; 1) false signal generated in the measurement through Two-frequency ac method, 2) Nonlinearity affecting the Hall effect in the liquid state, 3) Ac-dc method and its application. The results are as follows,1) The false signal through the two-frequency ac method is produced in the sample or the measuring system including amplifiers, especially at the interface between a electrode and sample solution. The false signal increases with an applied magnetic field. The signal accormpanies many harmonic trains of Hall one. The polarity sign of the signal does not correspond to that of the applied magnetic field.2)The variation in resistance of 10^<-7>/G corresponding to the applied magnetic field appears due to the Lorentz force in the liquid state. The value in solid state or semiconductor sample is neglected or within measuring tolerance. An incorrect signal corresponding to the square of magnetic field appears in the liquid of metals, even electrolyte solutions, and disappears when the metal samples are solidified. However, it appears in the solid state of ferromagnetics, Fe, Ni and semiconductor film, lnSb.3)The false signals are not observed through our ac-dc method even if there existed nonlinearities, besides the method shows the sign polarity corresponding to the magnetic field polarity, therefore the Hall signal is easily distinguished from the false signal. Another incorrct signal were decreased to thermal noise level with increasing the frequency of sample current over 1 kHz, Ture Hall signals with polarity sign were obtained in the liquid states.Measring of true Hall signal nearby DC,The cause of the incorrect signal corresponding to square of applied magnetic field and its mechanism, Auto-matic evaluation on measured Hall signals, should be expected to study more.

本项目主要研究液体中的霍尔效应：1）双频交流法测量中产生的假信号，2）影响液体中霍尔效应的非线性，3）交直流法及其应用。结果表明：（1）双频交流法的假信号产生于样品或含有放大器的测量系统中，特别是电极与样品溶液的界面处;假信号随着施加的磁场而增加。这个信号是由一号厅的许多谐波组成的。信号的极性符号与外加磁场的极性符号不对应。2）<-7>由于液体状态下的洛伦兹力，出现了与外加磁场对应的10^ /G的电阻变化。固态或半导体样品中的值被忽略或在测量公差范围内。在金属的液体中，甚至在电解质溶液中，都会出现一个与磁场平方对应的错误信号，当金属样品凝固后，这个错误信号就会消失。然而，它出现在铁磁性物质Fe、Ni和半导体薄膜InSb的固态中。3）即使存在非线性，通过我们的AC-DC方法也不会观察到假信号，而且该方法显示出与磁场极性相对应的符号极性，因此霍尔信号很容易与假信号区分开来。另一个不正确信号随取样电流频率的增加而降低到热噪声水平，在液态下得到了具有极性符号的真霍尔信号，直流附近真霍尔信号的测量，不正确信号对应于外加磁场平方的原因及其机理，被测霍尔信号的自动评价等有待进一步研究。

项目成果

M. Ogita: "Nonlinear Perplexities for Hall Measurement in Liquid Metals" 183rd Meeting of ECS, Extended Abstract. 2. 2542-2543 (1993)

M. Ogita：“液态金属霍尔测量的非线性困惑”ECS 第 183 次会议，扩展摘要。

荻田正己: "液体・固体状態のホール効果測定法による差異" 日本AEM学会誌. 2. 25-29 (1994)

Masami Ogita：“液态和固态中霍尔效应测量方法的差异”日本 AEM 学会杂志，2. 25-29 (1994)。

Masami Ogita et al.: "Effect of incorrect signal under magnetic field for Hall measurements in liquid states" J.Japan Soc.AEM.Vol.1, No.2. 10-14 (1993)

Masami Ogita 等人：“磁场下错误信号对液态霍尔测量的影响”J.Japan Soc.AEM.Vol.1，No.2。

Masami Ogita et al.: "Effect of resistance variation for Hall measurements in liquid metals" Proc.Int.ISEM Symp.Vol.5. 495-498 (1994)

Masami Ogita 等人：“液态金属中霍尔测量的电阻变化的影响”Proc.Int.ISEM Symp.Vol.5。

荻田 正巳 他: "液体状態のホール効果測定における磁界による微小抵抗変化の影響" The Second MAGDA Conference,1993. 89-92 (1993)

Masami Ogita 等人：“液态霍尔效应测量中磁场引起的微小电阻变化的影响”第二届 MAGDA 会议，1993 年，89-92 (1993)。