7 Tesla SQUID Magnetometer
(NSF DMR-0113714)
The Result of the Month
(October 2002)
Magnetic characterization of a 3D Cu Material
J.-H. Park*, E. Cizmar*, M. W. Meisel*, Y.-D. Huh**, D. R. Talham**
* Department of Physics, University of Florida
** Department of Chemistry, University of Florida
0.25
6
0.5
0.2
0.05
0
100
200
300
T (K)
T=2K
4
600
1/ (mol / emu)
0.10
0.3
3
*T (emu K / mol )
 (emu / mol)
0.15
0.4
M (10 emu G / mol)
5
0.20
3
2
400
200
0
1
0
100
200
300
T(K)
0.00
0
0
50
100
150
200
250
300
0
1
2
4
5
6
7
H (T)
T (K)
Fig. 1. χ vs T measured with applied field of 1 kG.
The inset shows a plot of χ *T as a function of
temperature.
3
Fig. 2. Magnetization at T = 2 K measured as a
function of applied field. 1/ χ vs T graph is shown in
the inset.
“Cu3D” is a monoclinic Cu compound, Cu[SO3(CH2)4SO3]·4H2O with M.W. = 383.829 g/mol,
studied in polycrystalline form and synthesized by Dr. Y.D. Huh in Dr. Talham’s group. The
Cu3D is a three dimensional (3D) Cu compound in which each Cu2+ (S = 1/2) site is
magnetically well separated from others through H and SO3 bondings. No significant
difference was obserseved between zero-field-cooled and field-cooled magnetizations (not
shown here). A constant χ*T value (within 3%, Fig. 1 inset) suggests that Cu3D is close to a
paramagnetic material. Corresponding g values from Curie law fitting of χ vs T and S = 1/2
Brillouin function fitting of M vs H are 2.17 and 2.16 respectively. This work is partially
supported by the ACS-PRF-36163-AC5 and the NSF DGE-0209410.
Questions or Suggestions email me juhyun@phys.ufl.edu