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1
Content available remote Magnetism and Specific Heat of TmRhX (X = Ga, Ge) Compounds
100%
Baran S. , Przewoźnik J. , Szytuła A.
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nr 6
998-1001
EN
Magnetic and specific heat data of the TmRhX (X = Ga, Ge) compounds are reported. These compounds crystallize in an orthorhombic crystal structure of the TiNiSi-type (space group Pnma). Magnetic data indicate that the compounds are antiferromagnets with the Néel temperature T_{N} equal to 3.9 K for TmRhGa and 6.0 K for TmRhGe. Magnetic susceptibility of TmRhGe has an additional peak at T_{t} = 10.6 K. In TmRhGe temperature dependence of χ"(T), the positions of both the peaks at T_{N} and T_{t} change with frequency indicating a relaxation process. These data suggest that with the decreasing temperature, first a cluster glass state and next the long-range aniferromagnetic order exists.
2
Content available remote Magnetocaloric Effect and Transition Order in HoAl
100%
Baran S. , Duraj R. , Szytuła A.
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nr 3
815-817
EN
Magnetic measurements of HoAl_{2} are reported. The compound crystallizes in the cubic MgCu_{2}-type crystal structure. HoAl_{2} exhibits two successive magnetic transitions: below T_{c} = 29 K a ferromagnetic order is formed while anomaly at T_{t} = 20 K is related to reorientation of magnetic moment. Near transition temperatures a magnetocaloric effect with magnetic entropy changes -ΔS_{m} equal to 6.3 J/(mol K) at T_{c} and 5.0 J/(mol K) at T_{t} for an external field μ_{0}H = 9 T is observed.
3
Content available remote Crystal Structure and Magnetic Properties of Tb_{11}O_{20}
88%
Baran S. , Duraj R. , Hoser A. , Penc B. , Szytuła A.
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nr 1
98-100
EN
Magnetic and neutron diffraction data for Tb_{11}O_{20} compound are reported. This compound crystallizes in a triclinic crystal structure described by the space group P1 and is antiferromagnetic with the Néel temperature 5.1 K.
4
Content available remote Neutron Diffraction Studies of Nanoparticle DyMnO_3 Compound
88%
Szytuła A. , Penc B. , Dyakonov V. , Baran S. , Hoser A.
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nr 1
65-66
EN
The neutron powder diffraction (NPD) measurements of the nano-size DyMnO_3 manganite have been performed. The obtained results indicate that this compound crystallizes in the orthorhombic crystal structure described by the space group Pnma. The Mn and Dy moments order antiferromagnetically at different temperatures and form modulated magnetic structure described by the propagation vector k=(k_x, 0, 0) with the different values of k_x component for the Mn and Dy sublattices. The values of k_x component for Mn sublattice increase with decreasing of the temperature and are smaller that in bulk compound. The wide Bragg peaks related to the Dy sublattice suggest that the magnetic order in this sublattice has the cluster-like character.
5
Content available remote Structural Chemistry and Magnetic Properties of R_2Ni_{2-x}In (R=Gd-Er, x=0.22 or 0.3) Compounds
75%
Tyvanchuk Y. , Baran S. , Jaworska-Gołąb T. , Duraj R. , Kalychak Y. , Szytuła A.
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nr 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.
6
Content available remote Neutron Diffraction Studies of Tb_2Ni_{2-x}In Intermetallic Compounds
75%
Szytuła A. , Baran S. , Hoser A. , Kalychak Y. M. , Penc B. , Tyvanchuk Y.
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nr 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.
7
Content available remote Magnetic Properties of Hexagonal RTIn Rare-Earth Intermetallics with Frustration
75%
Szytuła A. , Baran S. , Gondek Ł. , Arulraj A. , Penc B. , Stüsser N.
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nr 4
590-594
EN
Magnetic properties, including magnetic structure, of some RTIn compounds (R = Tb-Er; T = Cu, Ni, Pd, Pt, Au) with the hexagonal ZrNiAl-type crystal structure are reported. Distribution of the rare earth atoms in the basal plane is similar to the kagomé-lattice. Magnetic moments are localized exclusively on the rare earth atoms and form different types of magnetic ordering. Experimental results are analyzed within the Ruderman-Kittel-Kasuya-Yosida and crystal electric field frames. Monte Carlo simulations, including the J_{1} and J_{2} exchange integrals between nearest and next nearest spins and Dzialoshinsky-Moriya interaction, were performed resulting in a number of magnetic phases, some of which are in good agreement with the magnetic ordering determined in the neutron diffraction experiments.
8
Content available remote Magnetic Properties of the Nanocrystalline DyMnO_{3} Compound
63%
Dyakonov V. , Szytuła A. , Baran S. , Kravchenko Z. , Zubov E. , Iessenchuk O. , Bazela W. , Dul M. , Zarzycki A. , Szymczak H.
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nr 4
607-610
EN
We report on the X-ray powder diffraction and magnetic measurements of the polycrystalline and the two nanocrystalline samples of DyMnO_{3} compound synthesized at temperatures of 800 and 850°C. All samples at room temperature crystallize in the orthorhombic crystal structure (space group Pnma). The crystal structure parameters determined change only slightly with preparation methods but the average grains size of the nanoparticles determined from X-ray data increases significantly with increasing annealing temperature. Temperature dependence of the magnetic susceptibility indicates the antiferromagnetic order in Dy sublattice at low temperatures.
9
Content available remote Ireneusz Bobrowski, Zaproszenie do językoznawstwa
44%
Baran S.
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tom 20
329-332
EN
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