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24 April 2024 |
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Evolution from spiral to canted antiferromagnetic spin-ordered magnetic phase transition in Tb0.6Pr0.4MnO3 | | Harshit Agarwal
; Jose A Alonso
; Ángel Muñoz
; R J Choudhary
; O N Srivastava
; M A Shaz
; | | Date: |
25 Nov 2020 | | Abstract: | The present study reports on the structural and magnetic phase transitions in
Pr-doped polycrystalline Tb0.6Pr0.4MnO3, using high-resolution neutron powder
diffraction collected at SINQ spallation source (PSI), to emphasize the
suppression of spiral magnetic structure of pure TbMnO3 and the evolution to a
non-collinear A-type antiferromagnetic nature. The phase purity, Jahn-Teller
distortion, and one-electron bandwidth for eg orbital of Mn3+ cation have been
calculated for polycrystalline Tb0.6Pr0.4MnO3, in comparison to the parent
materials of TbMnO3 and PrMnO3 through the Rietveld refinement study from X-ray
diffraction data at room temperature. The temperature-dependent zero
field-cooled and field-cooled dc magnetization study at low temperature down to
5 K reveals variation in magnetic phase transition due to the effect of Pr3+
substitution at the Tb3+ site, which gives the signature of the canted
antiferromagnetic nature of the sample, with ferromagnetic clustering at low
temperature. A weak coercivity having the order of 2 KOe due to canted-spin
arrangement or ferromagnetic clustering has also been observed by the
field-dependent magnetization study at low temperatures. Neutron diffraction of
Tb0.6Pr0.4MnO3 confirms that the nuclear structure of the synthesized sample
maintains its orthorhombic symmetry down to 1.5 K. Also, the magnetic
structures have been solved at 50 K, 25 K, and 1.5 K through neutron powder
diffraction study, which shows a canted A-type antiferromagnetic spin
arrangement. | | Source: | arXiv, 2011.12553 | | Services: | Forum | Review | PDF | Favorites | |
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