Title :
Indirect method observing QHR steps at 900kHz
Author :
Minowa, Isao ; Inglis, Dave ; Young, Brent ; Wood, Barry
Author_Institution :
Electron. Eng., Tamagawa Univ.
Abstract :
Differential resistances of QHR were measured with increasing magnetic field from zero to 14T at 0.3K by dual frequency current combinations of 10kHz and 10.0001 kHz, 10kHz and 100.0001kHz, 900kHz and 900.0001kHz. A few thousands data of 0.1 Hz voltages were added by Excel software and then the QHR steps constructed again. One of the two samples were tested and got sharp steps at 900kHz as measured by a DC current, but the other one showed not so good shape. Therefore, it is easy method to check QHR´s characteristics for high frequency region
Keywords :
electric resistance measurement; magnetic fields; measurement standards; quantum Hall effect; 0.1 Hz; 10 kHz; 10.0001 kHz; 100.0001 kHz; 900 kHz; 900.0001 kHz; DC current; Excel software; differential resistances; dual frequency current combinations; magnetic field; quantized Hall resistance; Band pass filters; Current measurement; Electrical resistance measurement; Filtering theory; Frequency measurement; Magnetic field measurement; RLC circuits; Shape measurement; Voltage measurement; Voltmeters;
Conference_Titel :
Precision Electromagnetic Measurements Digest, 2004 Conference on
Conference_Location :
London
Print_ISBN :
0-7803-8494-6
Electronic_ISBN :
0-7803-8494-6
DOI :
10.1109/CPEM.2004.305359
