Magnetic ordering in the rare earth intermetallic compound Tb2 Ti3 Ge4: Magnetization and neutron diffraction studies

S. K. Malik, Jagat Lamsal, R. L. De Almeida, S. Quezado, W. B. Yelon, V. O. Garlea, A. V. Morozkin, R. Nirmala

Research output: Contribution to journalArticlepeer-review

Abstract

Magnetization and neutron diffraction studies on a polycrystalline Tb2 Ti3 Ge4 sample (orthorhombic Sm5 Ge4 -type structure, space group Pnma, No. 62) have been carried out. This compound is found to order antiferromagnetically at ∼18 K (TN). The magnetization (M) versus field (H) isotherms obtained at 2, 3, 5, and 10 K indicate a field-induced antiferromagnetic to ferromagnetic transition in fields of the order of 0.5 T. The saturation magnetization value at 2.5 K (M extrapolated to 1/H→0) is only ∼5.6 μB / Tb3+, suggesting the possible presence of crystal field effects with or without a persisting antiferromagnetic component. Neutron powder diffraction data at 10 K confirm the existence of a magnetic long range order. Modeling of the magnetic scattering reveals a complex and incommensurate antiferromagnetic spin structure below TN.

Original languageEnglish
Article number07A911
JournalJournal of Applied Physics
Volume105
Issue number7
DOIs
StatePublished - 2009

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