RU2007142081A - METHOD FOR NON-CONTACT DETERMINATION OF THE HALL RESISTANCE OF SEMICONDUCTORS - Google Patents
METHOD FOR NON-CONTACT DETERMINATION OF THE HALL RESISTANCE OF SEMICONDUCTORS Download PDFInfo
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- RU2007142081A RU2007142081A RU2007142081/28A RU2007142081A RU2007142081A RU 2007142081 A RU2007142081 A RU 2007142081A RU 2007142081/28 A RU2007142081/28 A RU 2007142081/28A RU 2007142081 A RU2007142081 A RU 2007142081A RU 2007142081 A RU2007142081 A RU 2007142081A
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- Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)
Abstract
Способ бесконтактного определения холловского сопротивления полупроводников, включающий охлаждение полупроводника до гелиевых температур, воздействие на него изменяющимся постоянным магнитным полем, вектор В индукции которого перпендикулярен поверхности образца и дополнительно переменным магнитным полем, изменяющимся со звуковой частотой, имеющим амплитуду во много меньшую В и вектор индукции, направленный параллельно вектору В, облучение образца СВЧ-излучением заданной частоты в направлении, параллельном вектору индукции В постоянного магнитного поля, выбор частоты излучения меньше частоты столкновений носителей заряда с атомами полупроводника, измерение первой производной интенсивности отраженного от образца СВЧ-излучения в зависимости от величины индукции В постоянного магнитного поля и определение по этой зависимости концентрации носителей заряда n и холловского сопротивления расчетным путем, отличающийся тем, что охлаждают дополнительно полупроводник до температуры ниже 2К, регистрируют сигнал, пропорциональный второй производной мощности СВЧ-излучения в зависимости от магнитного поля В, измеряют значение магнитного поля, соответствующее минимуму отраженного сигнала, определяют квантованное холловское сопротивление в широком диапазоне квантующих магнитных полей расчетным путем по формуле: ! ! где l - число периодов осцилляций Шубникова-де Гааза; ! e - заряд электрона; ! h - постоянная Планка; ! BN+l и ВN -значения магнитного поля, соответствующие N+l и N максимумам отраженного от полупроводника сигнала в области постоянного периода осцилляции Шубникова-де Гааза, Тл; ! Bν - значение магнитногоA method for non-contact determination of the Hall resistance of semiconductors, including cooling the semiconductor to helium temperatures, exposure to it with a changing constant magnetic field, the induction vector of which is perpendicular to the surface of the sample and additionally with an alternating magnetic field that varies with sound frequency, having an amplitude much smaller than B and the induction vector, directed parallel to vector B, irradiating the sample with microwave radiation of a given frequency in a direction parallel to the induction vector B post a specific magnetic field, the choice of the radiation frequency is less than the frequency of collisions of the charge carriers with the atoms of the semiconductor, the measurement of the first derivative of the intensity of the microwave radiation reflected from the sample as a function of the constant magnetic field induction B and the calculation of the concentration of charge carriers n and the Hall resistance from this calculation, characterized in that they additionally cool the semiconductor to a temperature below 2K, register a signal proportional to the second derivative of the microwave power depending on the magnetic field B, measure the value of the magnetic field corresponding to the minimum of the reflected signal, determine the quantized Hall resistance in a wide range of quantizing magnetic fields by calculation by the formula:! ! where l is the number of periods of the Shubnikov-de Haas oscillations; ! e is the electron charge; ! h is Planck's constant; ! BN + l and BN-values of the magnetic field corresponding to the N + l and N maxima of the signal reflected from the semiconductor in the region of the constant Shubnikov-de Haas oscillation period, T; ! Bν is the value of magnetic
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RU2007142081/28A RU2368982C2 (en) | 2007-11-13 | 2007-11-13 | Method for contactless definition of quantised hall resistance of semiconductors |
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RU2007142081/28A RU2368982C2 (en) | 2007-11-13 | 2007-11-13 | Method for contactless definition of quantised hall resistance of semiconductors |
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RU2007142081A true RU2007142081A (en) | 2009-05-20 |
RU2368982C2 RU2368982C2 (en) | 2009-09-27 |
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RU2007142081/28A RU2368982C2 (en) | 2007-11-13 | 2007-11-13 | Method for contactless definition of quantised hall resistance of semiconductors |
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Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
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CN103743929B (en) * | 2013-12-19 | 2016-10-05 | 中国计量科学研究院 | A kind of 1k Ω and 100 Ω measuring resistances |
RU2654935C1 (en) * | 2016-12-19 | 2018-05-23 | Федеральное государственное бюджетное образовательное учреждение высшего образования "Рязанский государственный радиотехнический университет" | Method of the semiconductors quantized hall resistance contactless determination and device for its implementation |
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Effective date: 20111114 |
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NF4A | Reinstatement of patent |
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MM4A | The patent is invalid due to non-payment of fees |
Effective date: 20141114 |