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1
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Magnetism of Uranium Intermetallics

100%
Suski W.
Acta Physica Polonica A
|
1997
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vol. 91
|
issue 1
77-87
EN
In the present review first the magnetic properties of the actinide metals are presented with a special emphasis on the uranium. Then the reason for starting the research on the uranium compounds in Wrocław is given together with a brief description of the magnetic properties of the binary compounds. The comparison with the rare-earth ternaries illustrates the difficulties in interpretation of the physical measurements of the uranium intermetallics in which the uranium as well as the transition metal atoms contribute to the magnetic ordering. Further, we present the features which could indicate the true contribution of both partners. However, we also stress that some of the properties which seem to prove the magnetic order on the uranium atom could result from particular crystal or band structure.
2
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Effect of Manganese on Magnetic and Electrical Properties of the RMn_{x}T_{12-x} Alloys

51%
Suski W., Wochowski K., Mydlarz T., Belan B.
Acta Physica Polonica A
|
2000
|
vol. 98
|
issue 5
505-511
EN
The magnetic and electrical properties of the tetragonal, ThMn_{12}-type RMn_{x}T_{12-x} alloys (R = Y, Ce, Pr, Nd, Sm and T = Fe, Co, Ni) were studied in broad temperature and magnetic field ranges to elucidate an influence of manganese on the magnetic ordering in these materials. Magnetic properties were examined at T=1.7-300K in magnetic field up to 14T, whereas the electrical properties were examined at T=4.2-300K, on the polycrystalline samples. Majority of the samples exhibit ferro- or ferrimagnetic properties. Some samples containing larger concentration of Mn are paramagnetic in the whole temperature range. The electrical resistivity of these alloys shows metallic character.
3
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Ground State Properties of Tb^{3+} Ion in TbNi_{10}Si_{2}

51%
Stefański P., Suski W., Wochowski K., Mydlarz T.
Acta Physica Polonica A
|
1997
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vol. 92
|
issue 2
281-284
EN
Ground state properties of Tb^{3+} ion were investigated in the tetragonal ThΜn_{12}-type TbNi_{10}Si_{2} compound on the basis of temperature dependence of the paramagnetic susceptibility and magnetization measurements. The rare earth temperature dependence of the susceptibility was calculated using the Van Vleck equation. The Γ_{t5}^{(1)} doublet is suggested to be a ground state separated by 9 K from the first excited singlet Γ_{t1}^{(2)}. The magnetic moment associated with the ground state doublet agrees with saturation magnetization data at 4.2 K. The overall crystal field splitting is estimated to be 105 K.
4
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Magnetic Anisotropy of UFe_{10-x}Ni_{x}Si_{2} Intermetallic Alloys

45%
Drzazga Z., Suski W., Wochowski K., Wójcik J., Winiarska A.
Acta Physica Polonica A
|
2000
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vol. 98
|
issue 5
555-560
EN
The magnetic anisotropy in UF_{10-x}Ni_{x}Si_{2} series has been studied by torsion magnetometry and initial ac magnetic susceptibility measurements in the temperature range of 77-293K. The effective anisotropy constant changes with Ni content showing some increase for intermediate concentration. An increase in magnetic anisotropy energy at low temperatures is due to the uranium sublattice ordering. Magnetic anisotropy behaviour in UFe_{2}Ni_{8}Si_{2} is influenced by an additional enhancement of the 3d sublattice connected with the ordering Fe magnetic moments.
5
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On the Crystal and Magnetic Behavior οf ScFe_{4}Al_{8} Single Crystal

39%
Rećko K., Dobrzyński L., Lemée-Cailleau M., Waliszewski J., Talik E., Suski W., Courtois P.
Acta Physica Polonica A
|
2009
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vol. 115
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issue 1
206-208
EN
Nuclear and magnetic properties of the ScFe_{4}Al_{8} single crystal were found to exhibit unparalleled complexity of nuclear and magnetic structures. Our previous neutron measurements revealed presence of two modulation vectors, both along [ε, ε, 0], however with different critical temperatures. Recent experiments forced us to revise our knowledge of the structural ordering in the sample. So far, the crystal structure of this alloy, being of ThMn_{12}-type, has never been questioned.
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