Full-text resources of PSJD and other databases are now available in the new Library of Science.
Visit https://bibliotekanauki.pl
Preferences help
Polish version English version Language
enabled [disable] Abstract
Number of results

Results found: 8

Number of results on page
first rewind previous Page / 1 next fast forward last

Search results

help Sort By:

help Limit search:
first rewind previous Page / 1 next fast forward last
1
Content available remote

Effect of Manganese on Magnetic and Electrical Properties of the RMn_{x}T_{12-x} Alloys

100%
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.
2
Content available remote

Ground State Properties of Tb^{3+} Ion in TbNi_{10}Si_{2}

100%
Stefański P., Suski W., Wochowski K., Mydlarz T.
Acta Physica Polonica A
|
1997
|
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.
3
Content available remote

High Spin-Low Spin Transitions in Cu_{0.2}Co_{0.76}Cr_{1.83}Se_4 Semiconductor

88%
Maciążek E., Groń T., Pacyna A., Mydlarz T., Krok-Kowalski J.
Acta Physica Polonica A
|
2012
|
vol. 121
|
issue 3
687-689
EN
Magnetization, ac and dc magnetic susceptibility measured in the zero-field-cooled mode were used to study the high spin-low spin transitions in polycrystalline Cu_{0.2}Co_{0.76}Cr_{1.83}Se_4 semiconductor. The real part component of fundamental susceptibility χ_1' (T) and its second (χ_2) and third (χ_3) harmonics revealed two spectacular peaks at 128 K and at 147 K, confirming the appearance of the spin-crossover phenomenon.
4
Content available remote

Superparamagnetic-Like Behaviour in RE_2WO_6 Tungstates (Where RE = Nd, Sm, Eu, Gd, Dy, Ho and Er)

88%
Groń T., Tomaszewicz E., Urbanowicz P., Duda H., Mydlarz T.
Acta Physica Polonica A
|
2011
|
vol. 119
|
issue 5
708-710
EN
The magnetization isotherms were used to study the superparamagnetic-like behaviour in polycrystalline (powder) RE_2WO_6 tungstates (where RE = Nd, Sm, Eu, Gd, Dy, Ho and Er). The magnetization isotherms of the majority tungstates under study revealed both the spontaneous magnetic moments and hysteresis characteristic for the superparamagnetic-like behaviour with blocking temperature T_{B} ≈ 30 K except the Sm_2WO_6 and Eu_2WO_6 compounds.
5
Content available remote

Influence of Cr-Substitution on the Electrical Properties of Fe_{1-x}Cr_xVSbO_6

88%
Duda H., Filipek E., Dąbrowska G., Groń T., Mydlarz T.
|
EN
Fe_{1-x}Cr_xVSbO_6 solid solution is semiconductor with the activation energy decreasing both in the intrinsic and extrinsic conductivity temperature regions as the Cr-content increases. The n-type conduction is observed for Fe-richer samples while a change of the Seebeck coefficient (from n to p) - for Cr-richer ones. Magnetic isotherms for all samples of solid solution under study are characteristic of the universal Brillouin function, indicating paramagnetic response. These effects are discussed within the framework of the appearance of the mixed valence of both Fe and Cr ions.
6
Content available remote

Spin Crossover in Cu_{x}Co_{y}Cr_{z}Se_4 Semiconductors

76%
Maciążek E., Groń T., Pacyna A., Mydlarz T., Zawisza B., Krok-Kowalski J.
Acta Physica Polonica A
|
2011
|
vol. 119
|
issue 5
711-713
EN
Magnetization and magnetic susceptibility measured in the zero-field-cooled mode were used to study the spin crossover transition in polycrystalline Cu_{x}Co_{y}Cr_{z}Se_4 compounds. With increasing Co content a transition from ferromagnetic order via ferrimagnetic one to antiferromagnetic-like behaviour was observed. This transition is accompanied with a lowering symmetry from cubic to monoclinic and for the latter the spin crossover phenomenon occurs. These results are considered in a framework of the ligand-field split and the spin-orbit coupling.
7
Content available remote

Specific Heat and Magnetic Properties of Single-Crystalline (Zn_{0.925}In_{0.054})[Cr_{1.84}In_{0.152}]Se_4 Semiconductor

76%
Malicka E., Groń T., Pacyna A., Ślebarski A., Goraus J., Gągor A., Mydlarz T.
Acta Physica Polonica A
|
2012
|
vol. 122
|
issue 6
1108-1110
EN
An antiferromagnetic order with a Néel temperature T_{N} = 17.5 K, a strong ferromagnetic exchange evidenced by a positive Curie-Weiss temperature θ_{CW} = 77.3 K, the fuzzy peaks in the real component of susceptibility χ'(T) and the disappearance of the second critical field were established. The curvature of specific heat C(T) and C(T)/T in surrounding of T_{N} indicated a broad peak, characteristic for the system with inhomogeneous magnetic state (spin-glass-like phase). The calculated magnetic entropy showed the value of S(T) ≈ 1 J/(mol K) which is extremely small; i.e., much lower than the magnetic contribution Rln(2S + 1) = 11.52 J/(mol K) calculated for the spin 3/2.
8
Content available remote

Influence of Substitution of the Chromium Ions by the Nonmagnetic Sb and Al Ions on the Magnetization Processes in CuCr_{2}X_{4} ( rm X = S, Se) Spinels

64%
Malicka E., Krok-Kowalski J., Warczewski J., Groń T., Duda H., Mydlarz T., Pawełczyk M., Pacyna A., Rduch P., Władarz G.
Acta Physica Polonica A
|
2009
|
vol. 116
|
issue 5
967-968
EN
Both the dc and ac magnetic susceptibilities as well as magnetization measurements were used to study the influence of the dilution of the magnetic chromium subarray by nonmagnetic antimony and aluminium ions on the magnetization processes for four spinel families under investigation. Substitution of the chromium ions by the nonmagnetic Sb and Al ions in the compounds under study leads to the very hard magnetization in the case of the compounds with Sb and very easy magnetization in the compounds with Al. This effect is connected with the electronic configurations of the Sb and Al ions as well as with ionic radii of these cations.
first rewind previous Page / 1 next fast forward last
JavaScript is turned off in your web browser. Turn it on to take full advantage of this site, then refresh the page.