Magnetic Excitations in PrBa2Cu4O8 Explored by Raman Scattering

Litvinchuk, A. P.; Börjesson, Lars; Thomsen, C.; Chu, C. W.

doi:10.1002/(sici)1521-3951(199909)215:1<507::aid-pssb507>3.0.co;2-k

Cited by 4 publications

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“…The Raman peak centered at 470 cm −1 is might be attributed to magnetic ordering effect on phonon line width consistent with earlier observation of bands at ~260 and 472 cm −1 due to magnon scattering [9]. It would be more practical to study the magnetic excitations in Bi 2 Fe 4 O 9 under the assumption that they involve two-magnon processes, like in the well-known cases of ferrites [29] or cuprates [30,31]. At higher frequency (>250 cm −1 ), it is unlikely the magnetic-order-induced bands correspond to onemagnon excitations but in rare-earth orthoferrites (RFeO 3 ; R = Dy, Ho, Er, Sm, etc.)…”

Section: Raman Scattering Analysissupporting

confidence: 83%

Structural, Electrical, and Magnetic Properties of Mullite-Type Ceramic: Bi₂Fe₄O₉

Sharma¹,

Kumar²,

Jingyou³

et al. 2021

Magnetic Materials and Magnetic Levitation

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This work reports the structure, electrical and magnetic properties of the orthorhombic (Pbam) structured bulk Bi2Fe4O9 synthesized by the solid-state reaction process. Bi2Fe4O9 has been studied using several experimental techniques such as X-ray diffraction, scanning electron microscopy, Raman spectroscopy, dielectric spectroscopy, and magnetometry. Rietveld-refined X-ray diffraction data and Raman spectroscopy results clearly reveal the formation of Bi2Fe4O9 perovskite structure and all the peaks of Bi2Fe4O9 perfectly indexed in the orthorhombic (Pbam) structure. It has been established that the Raman spectrum identified Ag, B2g, and B3g active optical phonon modes, and that the Raman peak at 470 cm−1 may have a magnetic origin. As a result, the coexistence of weak ferromagnetic and antiferromagnetic orders in Bi2Fe4O9 ceramic was established. The remanent magnetization (2Mr) and coercivity (2Hc) are 8.74 × 10−4 emu/g and 478.8 Oe, respectively. We report a remarkable multiferroic effects in polycrystalline Bi2Fe4O9 ceramic. These characteristics make this material very useful in technology and practical applications.

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Section: Raman Scattering Analysissupporting

confidence: 83%

Structural, Electrical, and Magnetic Properties of Mullite-Type Ceramic: Bi₂Fe₄O₉

Sharma¹,

Kumar²,

Jingyou³

et al. 2021

Magnetic Materials and Magnetic Levitation

View full text Add to dashboard Cite

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Structural, electrical, and magnetic properties of mullite-type Bi2Fe4O9 ceramic

et al. 2020

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Phonon and magnon scattering of antiferromagneticBi2Fe4O9

et al. 2010

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The phonon structure of antiferromagnetic Bi 2 Fe 4 O 9 ͑space group Pbnm No. 55, T N Ϸ 240 K͒ was studied theoretically by calculations of lattice dynamics and experimentally between 10 and 300 K by polarized Raman spectroscopy. Most of the 12A g +12B 1g +9B 2g +9B 3g Raman modes were unambiguously identified. Strong second-order scattering was observed for ab-plane-confined incident and scattered light polarizations. In addition to the phonon-scattering, broad Raman bands with typical characteristics of magnon scattering appear below T N . The magnon bands are analyzed on the basis of magnetic structure of Bi 2 Fe 4 O 9 and attributed to two-magnon excitations.

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Magnetic Excitations in PrBa2Cu4O8 Explored by Raman Scattering

Cited by 4 publications

References 9 publications

Structural, Electrical, and Magnetic Properties of Mullite-Type Ceramic: Bi₂Fe₄O₉

Structural, Electrical, and Magnetic Properties of Mullite-Type Ceramic: Bi₂Fe₄O₉

Structural, electrical, and magnetic properties of mullite-type Bi2Fe4O9 ceramic

Phonon and magnon scattering of antiferromagneticBi2Fe4O9

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Magnetic Excitations in PrBa2Cu4O8 Explored by Raman Scattering

Cited by 4 publications

References 9 publications

Structural, Electrical, and Magnetic Properties of Mullite-Type Ceramic: Bi2Fe4O9

Structural, Electrical, and Magnetic Properties of Mullite-Type Ceramic: Bi2Fe4O9

Structural, electrical, and magnetic properties of mullite-type Bi2Fe4O9 ceramic

Phonon and magnon scattering of antiferromagneticBi2Fe4O9

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Product

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Structural, Electrical, and Magnetic Properties of Mullite-Type Ceramic: Bi₂Fe₄O₉

Structural, Electrical, and Magnetic Properties of Mullite-Type Ceramic: Bi₂Fe₄O₉