Neutron diffraction studies of the magnetoelastic compounds Tb5SixGe4-x (x=2.2 and 2.5)

V. O. Garlea; J. L. Zarestky; C. Y. Jones; L. L. Lin; D. L. Schlagel; T. A. Lograsso; A. O. Tsokol; V. K. Pecharsky; K. A. Gschneidner; C. Stassis

doi:10.1103/PhysRevB.72.104431

Neutron diffraction studies of the magnetoelastic compounds Tb5SixGe4-x (x=2.2 and 2.5)

V. O. Garlea, J. L. Zarestky, C. Y. Jones, L. L. Lin, D. L. Schlagel, T. A. Lograsso, A. O. Tsokol, V. K. Pecharsky, K. A. Gschneidner, C. Stassis

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Abstract

We report the results of a neutron diffraction study, carried out on both single crystalline and polycrystalline samples of Tb5Si2.2Ge1.8 and polycrystalline Tb5Si2.5Ge1.5. On cooling, at approximately 120 K, the Tb5Si2.2Ge1.8 system undergoes a magnetoelastic transition from a high-temperature monoclinic-paramagnetic to a low-temperature orthorhombic-ferromagnetic structure. Between 120 K and 75 K, the magnetic structure has a net ferromagnetic component along the a axis direction. The moments are slightly canted with respect to the a axis, while the components along the b and c axes are ordered antiferromagnetically. A second magnetic transition occurs at approximately 75 K. Below this temperature, the magnetic structure consists of ferromagnetically aligned μx and μz projections of the magnetic moments and an antiferromagnetic arrangement of the μy moment components. Magnetic structures of Tb5Si2.5Ge1.5 are nearly identical to those of Tb5Si2.2Ge1.8.

Original language	English
Article number	104431
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	72
Issue number	10
DOIs	https://doi.org/10.1103/PhysRevB.72.104431
State	Published - Sep 1 2005
Externally published	Yes

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Garlea, V. O., Zarestky, J. L., Jones, C. Y., Lin, L. L., Schlagel, D. L., Lograsso, T. A., Tsokol, A. O., Pecharsky, V. K., Gschneidner, K. A., & Stassis, C. (2005). Neutron diffraction studies of the magnetoelastic compounds Tb5SixGe4-x (x=2.2 and 2.5). Physical Review B - Condensed Matter and Materials Physics, 72(10), Article 104431. https://doi.org/10.1103/PhysRevB.72.104431

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title = "Neutron diffraction studies of the magnetoelastic compounds Tb5SixGe4-x (x=2.2 and 2.5)",

abstract = "We report the results of a neutron diffraction study, carried out on both single crystalline and polycrystalline samples of Tb5Si2.2Ge1.8 and polycrystalline Tb5Si2.5Ge1.5. On cooling, at approximately 120 K, the Tb5Si2.2Ge1.8 system undergoes a magnetoelastic transition from a high-temperature monoclinic-paramagnetic to a low-temperature orthorhombic-ferromagnetic structure. Between 120 K and 75 K, the magnetic structure has a net ferromagnetic component along the a axis direction. The moments are slightly canted with respect to the a axis, while the components along the b and c axes are ordered antiferromagnetically. A second magnetic transition occurs at approximately 75 K. Below this temperature, the magnetic structure consists of ferromagnetically aligned μx and μz projections of the magnetic moments and an antiferromagnetic arrangement of the μy moment components. Magnetic structures of Tb5Si2.5Ge1.5 are nearly identical to those of Tb5Si2.2Ge1.8.",

author = "Garlea, {V. O.} and Zarestky, {J. L.} and Jones, {C. Y.} and Lin, {L. L.} and Schlagel, {D. L.} and Lograsso, {T. A.} and Tsokol, {A. O.} and Pecharsky, {V. K.} and Gschneidner, {K. A.} and C. Stassis",

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AU - Garlea, V. O.

AU - Zarestky, J. L.

AU - Jones, C. Y.

AU - Lin, L. L.

AU - Schlagel, D. L.

AU - Lograsso, T. A.

AU - Tsokol, A. O.

AU - Pecharsky, V. K.

AU - Gschneidner, K. A.

AU - Stassis, C.

PY - 2005/9/1

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N2 - We report the results of a neutron diffraction study, carried out on both single crystalline and polycrystalline samples of Tb5Si2.2Ge1.8 and polycrystalline Tb5Si2.5Ge1.5. On cooling, at approximately 120 K, the Tb5Si2.2Ge1.8 system undergoes a magnetoelastic transition from a high-temperature monoclinic-paramagnetic to a low-temperature orthorhombic-ferromagnetic structure. Between 120 K and 75 K, the magnetic structure has a net ferromagnetic component along the a axis direction. The moments are slightly canted with respect to the a axis, while the components along the b and c axes are ordered antiferromagnetically. A second magnetic transition occurs at approximately 75 K. Below this temperature, the magnetic structure consists of ferromagnetically aligned μx and μz projections of the magnetic moments and an antiferromagnetic arrangement of the μy moment components. Magnetic structures of Tb5Si2.5Ge1.5 are nearly identical to those of Tb5Si2.2Ge1.8.

AB - We report the results of a neutron diffraction study, carried out on both single crystalline and polycrystalline samples of Tb5Si2.2Ge1.8 and polycrystalline Tb5Si2.5Ge1.5. On cooling, at approximately 120 K, the Tb5Si2.2Ge1.8 system undergoes a magnetoelastic transition from a high-temperature monoclinic-paramagnetic to a low-temperature orthorhombic-ferromagnetic structure. Between 120 K and 75 K, the magnetic structure has a net ferromagnetic component along the a axis direction. The moments are slightly canted with respect to the a axis, while the components along the b and c axes are ordered antiferromagnetically. A second magnetic transition occurs at approximately 75 K. Below this temperature, the magnetic structure consists of ferromagnetically aligned μx and μz projections of the magnetic moments and an antiferromagnetic arrangement of the μy moment components. Magnetic structures of Tb5Si2.5Ge1.5 are nearly identical to those of Tb5Si2.2Ge1.8.

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Neutron diffraction studies of the magnetoelastic compounds Tb5SixGe4-x (x=2.2 and 2.5)

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