We have established the magnetic‐field independence up to 20 T of a capacitance thermometer based on the incommensurate crystal (Pb0.45Sn0.55)2P2Se6 in the temperature range from 25 mK to 0.5 K. The sensitivity of the thermometer, d ln C/d ln T, is 5×10−3 at low temperatures and is about an order of magnitude larger than for any other previously reported capacitance thermometer. The most sensitive temperature range of the thermometer can be tuned by varying the measuring ac frequency and voltage. The reproducibility of the thermometer upon cycling below 1 K is better than 1 mK.

1.
S. R.
Julian
,
P. A. A.
Teunissen
, and
S. A. J.
Wiegers
,
Phys. Rev. B
46
,
9821
(
1992
);
J. A. A. J.
Perenboom
,
K.
van Hulst
,
S. A. J.
Wiegers
and
J. C.
Maan
,
Physica B
201
,
507
(
1994
);
E.
Ter Haar
,
R.
Wagner
,
C. M. C. M.
van Woerkens
,
S. C.
Steel
,
G.
Frossati
,
L.
Skrbek
,
M. W.
Meisel
,
V.
Bindilatti
,
A. R.
Rodrigues
,
R.
Valls Martin
, and
N. F.
Oliveira
, Jr.
,
J. Low Temp. Phys.
99
,
151
(
1995
).
2.
G. Frossati, J. Gilchrist, H. Godfrin, and D. Thoulouze, in Proceedings of the ULT Hakoné Symposium (The Physical Society of Japan, Tokyo, 1977).
3.
S. A. J.
Wiegers
,
R.
Jochemsen
,
C. C.
Kranenburg
, and
G.
Frossati
,
Rev. Sci. Instrum.
58
,
2274
(
1987
).
4.
P.
Strehlow
,
Physica B
165&166
,
25
(
1990
).
5.
D.
Bakalyar
,
R.
Swinehart
, and
W.
Weyhmann
,
Rev. Sci. Instrum.
43
,
1221
(
1972
).
6.
See, for example, S. Hunklinger and M. von Schickfus, in Amorphous Solids: Low Temperature Properties, edited by W. A. Phillips (Springer, Berlin, 1981).
7.
J. P.
Heins
,
B.
Kluge
, and
E.
Hegenbarth
,
Ferroelect. Lett.
16
,
87
(
1993
).
8.
E.
Fischer
,
Phys. Status Solidi A
97
,
121
(
1986
).
9.
M. M.
Maior
,
P. H. M.
van Loosdrecht
,
Yu. M.
Vysochanskii
,
M. I.
Gurzan
,
P. J. E. M.
van der Linden
, and
H.
van Kempen
,
Appl. Phys. Lett.
62
,
2
(
1993
).
10.
Yu. M.
Vysochanskii
,
M. I.
Gursan
,
M. M.
Maior
,
S. I.
Perenchinskii
,
L. A.
Salo
, and
V. Yu.
Slivka
,
Sov. Phys. Solid State
27
,
529
(
1985
).
11.
J. A. A. J.
Perenboom
and
K.
van Hulst
,
Physica B
155
,
74
(
1989
).
12.
J. C. H.
Zeegers
,
A. Th. A. M.
de Waele
, and
H. M.
Gijsman
,
J. Low Temp. Phys.
84
,
37
(
1991
);
J. C. H. Zeegers, Ph.D. thesis, Technical University Eindhoven, 1991.
13.
For pure liquid 3He the relative increase in the viscosity due to a 20 T magnetic field is less than 0.5% below 100 mK. For a saturated 3He4He mixture this number is not yet known, but is expected to be similar; see, for example, A. E. Meyerovich, in Progress in Low-Temperature Physics (Elsevier, Amsterdam, 1987), Vol. XI.
14.
M.
von Schickfus
,
S.
Hunklinger
, and
L.
Piche
,
Phys. Rev. Lett.
35
,
867
(
1975
);
M.
von Schickfus
and
S.
Hunklinger
,
J. Phys. C
9
,
L439
(
1976
).
15.
G.
Frossati
,
J.
le Gilchrist
,
J. C.
Lasjaunias
, and
W.
Meyer
,
J. Phys. C
10
,
L515
(
1977
).
16.
R.
Frossati
,
R.
Maynard
,
R.
Rammal
, and
D.
Thoulouze
,
J. Phys. (Paris) Lett.
38
,
153
(
1977
).
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