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Magnetic Properties of Ho_{5}Ni_{2}In_{4}

100%
Tyvanchuk Y., Penc B., Szytuła A., Zarzycki A.
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issue 4
599-600
EN
X-ray diffraction and magnetic measurements of Ho_{5}Ni_{2}In_{4} are reported. This compound crystallizes in the orthorhombic Lu_{5}Ni_{2}In_{4}-type structure. Magnetic data indicate ferromagnetic properties below T_c = 30 K.
2
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Magnetic Properties RNi_5Sn (R = Pr, Nd) Compounds

88%
Tyvanchuk Y., Romaka L., Szytuła A., Duraj R., Zarzycki A.
Acta Physica Polonica A
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2013
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vol. 123
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issue 1
145-147
EN
X-ray diffraction and magnetic measurements of RNi_5Sn (R = Pr, Nd) compounds are reported. These compounds crystallize in the hexagonal CeNi_5Sn-type structure. Magnetic data indicate that both compounds are antiferromagnet with the Néel temperatures T_{N} equal to 24 K (R = Pr) and 8.8 K (R = Nd). The magnetic data below T_{N} suggest the complex magnetic order.
3
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Neutron Diffraction Studies of Tb_2Ni_{2-x}In Intermetallic Compounds

76%
Szytuła A., Baran S., Hoser A., Kalychak Y. M., Penc B., Tyvanchuk Y.
Acta Physica Polonica A
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2013
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vol. 124
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issue 6
994-997
EN
The magnetic ordering of the Tb_2Ni_{1.78}In and Tb_2Ni_2In have been studied by neutron diffraction measurements. Tb_2Ni_{1.78}In with the tetragonal Mo_2FeB_2-type (space group P4/mbm, tP10) is antiferromagnet with the Néel temperature equal to 20 K. Below this temperature Tb moments form collinear magnetic structure commensurate with the crystal, described by the propagation vectors equal to (1/4, 1/4, 1/2). Magnetic moment equal to 7.60(6) μ_{B} is parallel to c-axis. The Tb_2Ni_2In in the orthorhombic Mn_2 lB_2-type (space group Cmmm, oC10) was detected as an impurity in the studied sample. It orders antiferromagnetically below ≈ 100 K with collinear moment arrangement described by the propagation vector (1/2, 1/2, 1/2). t 1.6 K μ_{Tb} = 6.33(14) μ_{B} and is parallel to the c-axis.
4
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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.
5
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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.
6
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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.
7
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Magnetic Structure of RCuIn (R = Nd, Tb, Ho, Er)

64%
Szytuła A., Baran S., Jaworska-Gołąb T., Penc B., Zarzycki A., Stűsser N., Arulraj A., Tyvanchuk Y.
Acta Physica Polonica A
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2008
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vol. 113
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issue 4
1185-1192
EN
Magnetic and neutron diffraction measurements of RCuIn (R = Nd, Tb, Ho, Er) are reported. The compounds crystallize in the hexagonal ZrNiAl-type structure. The ZrNiAl lattice originates from a distortion of a kagomélattice. The studied compounds are antiferromagnets with the Néel temperature equal to 4.9 K for R = Nd, 14.5 K for R = Tb, 4.5 K for R = Ho and 3.5 K for R = Er. The magnetic ordering is described by the propagation vectorwe k = (1/2, 1/2, k_z) with k_z equal to 0.161(6) for R = Nd, 0.2213(5) for R = Tb, 0.2510(3) for R = Ho and 0 for R = Er. The magnetic structure is noncollinear with magnetic moments in the basal plane for R = Nd, Tb and Ho and collinear with magnetic moments parallel to the c-axis for R = Er. The observed magnetic ordering results from the competition between exchange interactions of the Ruderman-Kittel-Kasuya-Yosida type, the geometrical frustration of the rare-earth magnetic moments and the influence of the crystal electric field. The latter affects the direction of magnetic moments and is responsible for the magnetic crystalline anisotropy.
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