Related Experiment Video
Updated: Nov 8, 2025
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Visualizing Uniaxial-strain Manipulation of Antiferromagnetic Domains in Fe1+YTe Using a Spin-polarized Scanning Tunneling Microscope
Published on: March 24, 2019
8.3K
Evolution from sinusoidal to collinear A-type antiferromagnetic spin-ordered magnetic phase transition in
Harshit Agarwal1, José Antonio Alonso2, Ángel Muñoz3
1Department of Physics, Institute of Science, Banaras Hindu University, Varanasi, 221005, India.
Summary
Praseodymium doping in terbium manganites suppresses sinusoidal magnetic structures, leading to collinear antiferromagnetic ordering. This study reveals structural and magnetic phase transitions in Tb$_{0.6}$Pr$_{0.4}$MnO$_{3}$ using neutron powder diffraction.
Area of Science:
- Condensed Matter Physics
- Materials Science
- Magnetism
Background:
- Rare-earth manganites exhibit complex magnetic and structural properties.
- Terbium manganite (TbMnO$_{3}$) shows a sinusoidal magnetic structure.
- Praseodymium manganite (PrMnO$_{3}$) has distinct magnetic ordering.
Purpose of the Study:
- To investigate the structural and magnetic phase transitions in Pr-doped Tb$_{0.6}$Pr$_{0.4}$MnO$_{3}$.
- To understand the effect of Pr$^{3+}$ substitution on the magnetic ordering of TbMnO$_{3}$.
- To determine the magnetic structure and its evolution with temperature.
Main Methods:
- High-resolution neutron powder diffraction (NPD) at SINQ spallation source.
- Rietveld refinement analysis of x-ray diffraction (XRD) data at room temperature.
- Temperature-dependent dc magnetization studies (zero field-cooled and field-cooled).
- Field-dependent magnetization measurements at low temperatures.
Main Results:
- Tb$_{0.6}$Pr$_{0.4}$MnO$_{3}$ crystallizes in the orthorhombic GdFeO$_{3}$ type structure (Pnma space group).
- Pr$^{3+}$ substitution suppresses the sinusoidal magnetic structure of TbMnO$_{3}$, inducing collinear A-type antiferromagnetic ordering.
- Magnetic structures solved at various temperatures confirm A-type antiferromagnetic spin arrangement (Pn'ma magnetic space group).
- A weak ferromagnetic component and coercivity (approx. 2 kOe) observed at low temperatures due to canted spins or Terbium ordering.
Conclusions:
- Praseodymium doping significantly alters the magnetic phase transitions in terbium manganites.
- The synthesized Tb$_{0.6}$Pr$_{0.4}$MnO$_{3}$ exhibits robust orthorhombic nuclear structure down to 1.5 K.
- The study elucidates the evolution from sinusoidal to A-type antiferromagnetic ordering upon Pr doping.
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