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Substitution Study on the Coherent Kondo State in CeCu_{5}In

100%
Kaczorowski D., Kalychak Y., Zaremba V.
Acta Physica Polonica A
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2000
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vol. 97
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issue 1
189-192
EN
Ternary alloys CeCu_{5-x}In_{1+x} were studied by means of magnetic and electrical resistivity measurements. In CeCu_{5}In a coherent Kondo state without long-range magnetic order develops at low temperatures. It transforms into an incoherent Kondo state upon small substitution of In for Cu.
2
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Structural Chemistry and Magnetic Properties of R_2Ni_{2-x}In (R=Gd-Er, x=0.22 or 0.3) Compounds

76%
Tyvanchuk Y., Baran S., Jaworska-Gołąb T., Duraj R., Kalychak Y., Szytuła A.
Acta Physica Polonica A
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2012
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vol. 121
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issue 3
678-681
EN
X-ray diffraction and magnetic measurements of R_2Ni_{2 - x}In (R = Ho, Dy, x = 0.3 and R = Gd, Tb, Er, x = 0.22) compounds are reported. The compounds crystallize in the tetragonal Mo_2FeB_2-type crystal structure (space group P4/mbm). Magnetic measurements reveal antiferromagnetic order with the Néel temperatures T_{N} equal to 26.4 K (Gd), 20.2 K (Tb), 8.3 K (Dy), 7.1 K (Ho), and 6.3 K (Er). For R = Gd, Tb and Er an additional phase transition below T_{N} is observed at 13.5, 13.1, and 5.0 K, respectively.
3
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Magnetic Properties of Dy_{11}Si_4In_6

76%
Duraj D., Baran S., Jaworska-Gołąb T., Kalychak Y., Przewoźnik J., Szytuła A., Tyvanchuk Y.
Acta Physica Polonica A
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2012
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vol. 121
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issue 5-6
1118-1120
EN
Magnetic and specific heat measurements of Dy_{11}Si_4In_6 are reported. This compound crystallizes in the tetragonal Sm_{11}Ge_4In_6-type crystal structure (space group I4/mmm), in which Dy atoms occupy four different sites. The AC and DC magnetic measurements suggest complex magnetic properties. Below T_{c} = 52 K magnetic ordering has a ferromagnetic component, while below 20 K a change of the properties is observed. Near the Curie temperature the magnetocaloric effect with the magnetic entropy change ΔS_{m} equal to 16.5 J/(kg K) is observed. The specific heat data indicate only the phase transition at 52 K.
4
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Influence of Co Doping on Crystal and Magnetic Properties of Gd_2Cu_2In

76%
Gondek Ł., Szytuła A., Kaczorowski D., Szewczyk A., Gutowska M., Tyvanchuk Y., Kalychak Y.
Acta Physica Polonica A
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2012
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vol. 122
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issue 1
216-219
EN
Physical properties of Gd_2Cu_{2 - x}Co_{x}In (x = 0.1, 0.2, 0.3) samples are investigated. The paper brings results of X-ray diffraction, magnetometric as well as specific heat studies. It was found that only sample with x = 0.1 exhibits desired crystal structure. Other compositions show existence of impurities due to lack of dissolution Co atoms. For Gd_2Cu_{1.9}Co_{0.1}In sample the Curie temperature of 92.5 K was evidenced. Thus, an enhancement of ferromagnetic correlations with comparison to Gd_2Cu_2In sample was evidenced. It was found that Gd_2Cu_{1.9}Co_{0.1}In sample exhibits magnetocaloric effect within broad temperature range.
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