Principles and performance of a high‐field time domain magnetic spectrometer

Autor:	P. Wyder, T. Strutz, A. M. Witowski
Rok vydání:	1993
Předmět:	Materials science Spectrometer Condensed matter physics Spin–lattice relaxation Magnetic semiconductor Magnetic field law.invention Magnetization Paramagnetism law Electromagnetic coil Condensed Matter::Strongly Correlated Electrons Electron paramagnetic resonance Instrumentation
Zdroj:	Review of Scientific Instruments. 64:1853-1861
ISSN:	1089-7623 0034-6748
DOI:	10.1063/1.1143968
Popis:	A time domain magnetic spectrometer based on a pick‐up coil is presented for the study of spin‐lattice relaxation rates in paramagnetic samples at high magnetic fields and at liquid‐helium temperatures. The equilibrium between the spin system and the lattice is disturbed either by heating the spin system under the electron spin resonance condition (using far‐infrared laser pulses) or by heating the lattice (using nonresonant laser pulses). Resulting magnetization changes induce a voltage in a pick‐up coil oriented parallel to the field. By measuring the temporal evolution of this voltage, one can observe the spin‐lattice relaxation directly. The spin‐lattice relaxation in the diluted magnetic semiconductor CdMnTe is measured in order to demonstrate the performance of the spectrometer. The two methods of disturbing the equilibrium between the spin system and the lattice are compared.
Databáze:	OpenAIRE
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