Electronic Resource
[S.l.]
:
American Institute of Physics (AIP)
Review of Scientific Instruments
68 (1997), S. 4516-4520
ISSN:
1089-7623
Source:
AIP Digital Archive
Topics:
Physics
,
Electrical Engineering, Measurement and Control Technology
Notes:
We have built an ac microcalorimeter which uses a diode laser as the heater. The absence of a contact heater reduces the total addendum. This method has several advantages over the typical quartz lamp and mechanical chopper wheel configuration. The laser is modulated by a lock-in amplifier which provides a wider choice of operating frequencies, typically from 0.2 to 50 Hz. The microcalorimeter has been used from near room temperature to 5 K. Single-crystal samples of YBCO with a mass as small as 4 μg have been measured. The device is particularly useful in the study of whiskers and other very small samples. © 1997 American Institute of Physics.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.1148423
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