Magnetization processes of polycrystalline La0.7Pb0.3Mn1-xFexO3

S. L. Young, H. Z. Chen, M. C. Kao, Lance Horng, Yu-Tai Shih

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

A systematic investigation of the magnetic properties in the perovskite materials La0.7Pb0.3Mn1-xFexO3 is presented in this study. The distortion induced by Mn-site substitution is not obvious as radii of Fe and Mn are similar for low Fe-content samples. Powder X-ray diffraction patterns show the same crystallographic phase of rhombohedral symmetry with space group R over(3, -) c for x{less-than or slanted equal to}0.4 and change to orthorhombic symmetry with space group Pnma for x{greater than or slanted equal to}0.6. The zero field cooling-field cooling curves and the values of temperature-dependence magnetization indicate ferromagnetic Mn3+-O2--Mn4+ double-exchage interaction would be gradually replaced by antiferromagnetic Fe3+-O2--Mn4+ and Fe3+-O2--Fe4+ exchange coupling for x = 0.6 and 0.8 and would be completely replaced by Fe3+-O2--Fe4+ for x = 1.0. From the results of experiments, the substitution of Mn by Fe suppresses the double-exchange interaction, weakens the ferromagnetism and consequently decreases the ferromagnetic transition temperature TC and saturation magnetization MS.

Original languageEnglish
JournalJournal of Magnetism and Magnetic Materials
Volume303
Issue number2 SPEC. ISS.
DOIs
Publication statusPublished - 2006 Jan 1

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Magnetization
Substitution reactions
substitutes
Cooling
cooling
magnetization
Exchange coupling
Ferromagnetism
Exchange interactions
symmetry
Saturation magnetization
Perovskite
Diffraction patterns
ferromagnetism
Superconducting transition temperature
Magnetic properties
diffraction patterns
transition temperature
interactions
magnetic properties

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Cite this

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title = "Magnetization processes of polycrystalline La0.7Pb0.3Mn1-xFexO3",
abstract = "A systematic investigation of the magnetic properties in the perovskite materials La0.7Pb0.3Mn1-xFexO3 is presented in this study. The distortion induced by Mn-site substitution is not obvious as radii of Fe and Mn are similar for low Fe-content samples. Powder X-ray diffraction patterns show the same crystallographic phase of rhombohedral symmetry with space group R over(3, -) c for x{less-than or slanted equal to}0.4 and change to orthorhombic symmetry with space group Pnma for x{greater than or slanted equal to}0.6. The zero field cooling-field cooling curves and the values of temperature-dependence magnetization indicate ferromagnetic Mn3+-O2--Mn4+ double-exchage interaction would be gradually replaced by antiferromagnetic Fe3+-O2--Mn4+ and Fe3+-O2--Fe4+ exchange coupling for x = 0.6 and 0.8 and would be completely replaced by Fe3+-O2--Fe4+ for x = 1.0. From the results of experiments, the substitution of Mn by Fe suppresses the double-exchange interaction, weakens the ferromagnetism and consequently decreases the ferromagnetic transition temperature TC and saturation magnetization MS.",
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Magnetization processes of polycrystalline La0.7Pb0.3Mn1-xFexO3 . / Young, S. L.; Chen, H. Z.; Kao, M. C.; Horng, Lance; Shih, Yu-Tai.

In: Journal of Magnetism and Magnetic Materials, Vol. 303, No. 2 SPEC. ISS., 01.01.2006.

Research output: Contribution to journalArticle

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AU - Chen, H. Z.

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AU - Shih, Yu-Tai

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N2 - A systematic investigation of the magnetic properties in the perovskite materials La0.7Pb0.3Mn1-xFexO3 is presented in this study. The distortion induced by Mn-site substitution is not obvious as radii of Fe and Mn are similar for low Fe-content samples. Powder X-ray diffraction patterns show the same crystallographic phase of rhombohedral symmetry with space group R over(3, -) c for x{less-than or slanted equal to}0.4 and change to orthorhombic symmetry with space group Pnma for x{greater than or slanted equal to}0.6. The zero field cooling-field cooling curves and the values of temperature-dependence magnetization indicate ferromagnetic Mn3+-O2--Mn4+ double-exchage interaction would be gradually replaced by antiferromagnetic Fe3+-O2--Mn4+ and Fe3+-O2--Fe4+ exchange coupling for x = 0.6 and 0.8 and would be completely replaced by Fe3+-O2--Fe4+ for x = 1.0. From the results of experiments, the substitution of Mn by Fe suppresses the double-exchange interaction, weakens the ferromagnetism and consequently decreases the ferromagnetic transition temperature TC and saturation magnetization MS.

AB - A systematic investigation of the magnetic properties in the perovskite materials La0.7Pb0.3Mn1-xFexO3 is presented in this study. The distortion induced by Mn-site substitution is not obvious as radii of Fe and Mn are similar for low Fe-content samples. Powder X-ray diffraction patterns show the same crystallographic phase of rhombohedral symmetry with space group R over(3, -) c for x{less-than or slanted equal to}0.4 and change to orthorhombic symmetry with space group Pnma for x{greater than or slanted equal to}0.6. The zero field cooling-field cooling curves and the values of temperature-dependence magnetization indicate ferromagnetic Mn3+-O2--Mn4+ double-exchage interaction would be gradually replaced by antiferromagnetic Fe3+-O2--Mn4+ and Fe3+-O2--Fe4+ exchange coupling for x = 0.6 and 0.8 and would be completely replaced by Fe3+-O2--Fe4+ for x = 1.0. From the results of experiments, the substitution of Mn by Fe suppresses the double-exchange interaction, weakens the ferromagnetism and consequently decreases the ferromagnetic transition temperature TC and saturation magnetization MS.

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