| Issue |
Europhys. Lett.
Volume 69, Number 2, January 2005
|
|
|---|---|---|
| Page(s) | 270 - 276 | |
| Section | Condensed matter: electronic structure, electrical, magnetic, and optical properties | |
| DOI | https://doi.org/10.1209/epl/i2004-10337-8 | |
| Published online | 17 December 2004 | |
Low-temperature microwave emission from molecular clusters
Departament de Física Fonamental, Universitat de Barcelona Avda. Diagonal 647, 08028 Barcelona, Spain
Received:
15
June
2004
Accepted:
12
November
2004
We investigate the experimental detection of the electromagnetic
radiation generated in the fast magnetization reversal in
-acetate at low temperatures. In our experiments we
used large single crystals and assemblies of several small single
crystals of -acetate placed inside a cylindrical
stainless-steel waveguide in which an 
hot-electron
device was also placed to detect the radiation. All this was set
inside a SQUID magnetometer that allowed to change the magnetic
field and measure the magnetic moment and the temperature of the
sample as the detected simultaneously the radiation
emitted from the molecular magnets. Our data show a sequential
process in which the fast inversion of the magnetic moment first
occurs, then the radiation is detected by the device,
and finally the temperature of the sample increases during
15
to subsequently recover its original value in several
hundred milliseconds.
PACS: 75.50.Xx – Molecular magnets / 75.45.+j – Macroscopic quantum phenomena in magnetic systems
© EDP Sciences, 2005
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