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Neutron Diffraction Studies of Tb_2Ni_{2-x}In Intermetallic Compounds

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Szytuła A., Baran S., Hoser A., Kalychak Y. M., Penc B., Tyvanchuk Y.

Acta Physica Polonica A

2013

vol. 124

issue 6

994-997

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.

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1 Acta Physica Polonica A

1 2013

1 Baran S.

1 Hoser A.

1 Kalychak Y. M.

1 Penc B.

1 Szytuła A.

1 Tyvanchuk Y.

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Neutron Diffraction Studies of Tb_2Ni_{2-x}In Intermetallic Compounds