High sensitivity detection of radio-frequency modulated magnetic moment in semiconductors
Data(s) |
01/10/2011
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Resumo |
An experimental setup has been realized to measure weak magnetic moments which can be modulated at radio frequencies (similar to 1-5 MHz). Using an optimized radio-frequency (RF) pickup coil and lock-in amplifier, an experimental sensitivity of 10(-15) Am(2) corresponding to 10(-18) emu has been demonstrated with a 1 s time constant. The detection limit at room temperature is 9.3 x 10(-16) Am(2)/root Hz limited by Johnson noise of the coil. The setup has been used to directly measure the magnetic moment due to a small number (similar to 7 x 10(8)) of spin polarized electrons generated by polarization modulated optical radiation in GaAs and Ge. (C) 2011 American Institute of Physics. [doi: 10.1063/1.3654229] |
Formato |
application/pdf |
Identificador |
http://eprints.iisc.ernet.in/42536/1/Rev_Sci_Ins_82-10_2011.pdf Guite, Chinkhanlun and Venkataraman, V (2011) High sensitivity detection of radio-frequency modulated magnetic moment in semiconductors. In: Review of Scientific Instruments, 82 (10). |
Publicador |
American Institute of Physics |
Relação |
http://rsi.aip.org/resource/1/rsinak/v82/i10/p103905_s1 http://eprints.iisc.ernet.in/42536/ |
Palavras-Chave | #Physics |
Tipo |
Journal Article PeerReviewed |