Crystal and magnetic structures of SrBi{sub 0.2}Tb{sub 0.8}O{sub 3} via neutron diffraction

doi:https://doi.org/10.1103/PhysRevB.55.14335

Title: Crystal and magnetic structures of SrBi{sub 0.2}Tb{sub 0.8}O{sub 3} via neutron diffraction

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Abstract

Crystal and magnetic structures of SrBi{sub 0.2}Tb{sub 0.8}O{sub 3} have been studied {ital via} neutron powder diffraction. As many other perovskites, SrBi{sub 0.2}Tb{sub 0.8}O{sub 3} is orthorhombic, Pbnm space group, with a=5.8948(2){Angstrom}, b=5.9741(2){Angstrom}, and c=8.3793(3){Angstrom} at T=300K. Magnetic-susceptibility measurements yield antiferromagnetic order with the paramagnetic Curie temperature {theta}{sub P}={minus}34.9K and the effective magnetic moment {mu}{sub eff}=8.12{mu}{sub B}/Tb. This proves that the substitution of Bi for Tb in SrTbO{sub 3} does not affect the valency of Tb which remains close to +4. Bismuth occurs as a mixture of Bi{sup +3} and Bi{sup +5} giving the effective valency also close to +4. Two magnetic transitions are observed: at T{sub N}=25.5K and T{sub N}=5.1K. A collinear structure, with Tb magnetic moments parallel to the {bold b} axis exists for T{sub N}{le}T{le}T{sub N}. Below T{sub N}, a small antiferromagnetic component develops parallel to the {bold c} axis, giving rise to the noncollinear antiferromagnetic structure. Both magnetic phases can be described within the Pbnm magnetic space group. {copyright} {ital 1997} {ital The American Physical Society}

Authors:

Wolcyrz, M; Horyn, R ^[1]; Andre, G; Bouree, F ^[2]

Institute of Low Temperature and Structure Research, Polish Academy of Sciences, ul. Okolna 2, 50-950 Wroclaw 2 (Poland)
Laboratoire Leon Brillouin (CEA-CNRS), CEA-Saclay, 91191 Gif-sur-Yvette Cedex (France)

Publication Date:: 1997-06-01

OSTI Identifier:: 509044

Resource Type:: Journal Article

Journal Name:: Physical Review, B: Condensed Matter

Additional Journal Information:: Journal Volume: 55; Journal Issue: 21; Other Information: PBD: Jun 1997

Country of Publication:: United States

Language:: English

Subject:: 36 MATERIALS SCIENCE; STRONTIUM OXIDES; CRYSTAL STRUCTURE; MAGNETIC PROPERTIES; TERBIUM OXIDES; BISMUTH OXIDES; STRONTIUM COMPOUNDS; BISMUTH COMPOUNDS; TERBIUM COMPOUNDS; MAGNETIC SUSCEPTIBILITY; CURIE POINT; ANTIFERROMAGNETIC MATERIALS; NEUTRON DIFFRACTION; BISMUTH IONS; MAGNETIC MOMENTS

Citation Formats


                    Wolcyrz, M, Horyn, R, Andre, G, and Bouree, F. Crystal and magnetic structures of SrBi{sub 0.2}Tb{sub 0.8}O{sub 3} via neutron diffraction.  United States: N. p., 1997. 
        Web.  doi:10.1103/PhysRevB.55.14335.

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                    Wolcyrz, M, Horyn, R, Andre, G, & Bouree, F. Crystal and magnetic structures of SrBi{sub 0.2}Tb{sub 0.8}O{sub 3} via neutron diffraction.  United States.  https://doi.org/10.1103/PhysRevB.55.14335

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                    Wolcyrz, M, Horyn, R, Andre, G, and Bouree, F. Sun .  
        "Crystal and magnetic structures of SrBi{sub 0.2}Tb{sub 0.8}O{sub 3} via neutron diffraction".  United States.  https://doi.org/10.1103/PhysRevB.55.14335.

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@article{osti_509044,

  title        = {Crystal and magnetic structures of SrBi{sub 0.2}Tb{sub 0.8}O{sub 3} via neutron diffraction},

  author       = {Wolcyrz, M and Horyn, R and Andre, G and Bouree, F},

  abstractNote = {Crystal and magnetic structures of SrBi{sub 0.2}Tb{sub 0.8}O{sub 3} have been studied {ital via} neutron powder diffraction. As many other perovskites, SrBi{sub 0.2}Tb{sub 0.8}O{sub 3} is orthorhombic, Pbnm space group, with a=5.8948(2){Angstrom}, b=5.9741(2){Angstrom}, and c=8.3793(3){Angstrom} at T=300K. Magnetic-susceptibility measurements yield antiferromagnetic order with the paramagnetic Curie temperature {theta}{sub P}={minus}34.9K and the effective magnetic moment {mu}{sub eff}=8.12{mu}{sub B}/Tb. This proves that the substitution of Bi for Tb in SrTbO{sub 3} does not affect the valency of Tb which remains close to +4. Bismuth occurs as a mixture of Bi{sup +3} and Bi{sup +5} giving the effective valency also close to +4. Two magnetic transitions are observed: at T{sub N}=25.5K and T{sub N}=5.1K. A collinear structure, with Tb magnetic moments parallel to the {bold b} axis exists for T{sub N}{le}T{le}T{sub N}. Below T{sub N}, a small antiferromagnetic component develops parallel to the {bold c} axis, giving rise to the noncollinear antiferromagnetic structure. Both magnetic phases can be described within the Pbnm magnetic space group. {copyright} {ital 1997} {ital The American Physical Society}},

  doi          = {10.1103/PhysRevB.55.14335},

  url          = {https://www.osti.gov/biblio/509044},
  journal      = {Physical Review, B: Condensed Matter},
number       = 21,

  volume       = 55,

  place        = {United States},

  year         = {1997},

  month        = {6}

}

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