Sequence of structural transitions in BiFeO3–RMnO3 thin films (R=Rare earth)

Lahmar, Abdelilah; Es‐Souni, M.

doi:10.1016/j.ceramint.2014.12.157

Cited by 13 publications

(4 citation statements)

References 20 publications

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“…We have assigned these features to respectively symmetric and antisymmetric stretching of the basal oxygen ions of the Mn 3+ O6 octahedra associated with the Jahn-Teller distortion. More discussion about this behavior and the effect of the presence of manganese on the BFO host lattice can be found in our previous works [16,17]. For BGFMO with Cobalt, the spectrum is similar to the mother phase's one, albeit a shoulder is observed around 676 cm -1 .…”

Section: Methodsmentioning

confidence: 64%

Enhanced magnetization in multiferroic nanocomposite Bi0.9Gd0.1Fe0.9Mn0.05X0.05O3 (X= Cr, Co) thin films

et al. 2020

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In this work we elaborated and characterized nanocomposite thin films using a preselected multiferroic matrix Bi0.9Gd0.1Fe0.9Mn0.1O3 (BGFMO) in the aim to enhance their basic ferroelectric and magnetic properties. The local ferroelectric character of these nanocomposites thin films was investigated by piezoresponse force microscopy (PFM). Switching behavior for ferroelectric domains was probed by locally manipulating domains. The magnetic investigation showed that the incorporation of transition metal elements in the BGFMO matrix brings out interesting increase in the macroscopic magnetisation at room temperature. Moreover, a spin glass type behavior is observed in M(T) curves for the studied thin films.

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Section: Methodsmentioning

confidence: 64%

Enhanced magnetization in multiferroic nanocomposite Bi0.9Gd0.1Fe0.9Mn0.05X0.05O3 (X= Cr, Co) thin films

et al. 2020

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“…The observation of the existence of dual phases i.e., rhombohedral (R3c) and orthorhombic (Pnma or Pbnm) in rare earth (RE)-modified BFO has previously been reported [31]. Recent reports show that BFO in solid solution with rare earth manganites (RMnO 3 ) i.e., BiFeO 3 -RMnO 3 (R=La, Gd, Ho and Dy), and (1-x)BiFeO 3 -xYMnO 3 undergo a structural phase transition from R3c to R3c + Pnma over a wide compositional range [32][33][34]. This structural transition to dual phases was accompanied by a significant improvement of multiferroic properties within BFO.…”

Section: A X-ray Analysismentioning

confidence: 99%

Room temperature exchange bias in antiferromagnetic composite BiFeO3-TbMnO3

Gupta

Ghosh

Kumar

et al. 2019

Journal of Applied Physics

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We report the presence of giant spontaneous exchange bias (H SEB ) in a hard and soft antiferromagnetic composite of BiFeO 3 -TbMnO 3 (BFO-TMO in 7:3 and 8:2 ratio). The H SEB varies between 5-778Oe, but persists up to room temperature with a maximum near a spin reorientation transition temperature observed from magnetization vs. temperature measurement in Zero-field cooled (ZFC) and Field cooled (FC) modes. Isothermal remnant magnetization measurements at room temperature indicate the presence of an interfacial layer of a 2 dimensional dilute antiferromagnet in a field (2D DAFF). A stable value of the exchange bias has been observed via training effect measurements which signify the role of interfacial exchange coupling in the system. Based on the experimental results we explain the presence of the giant spontaneous exchange bias on the basis of a strong strain-mediated magnetoelectric coupling induced exchange interaction and the creation of 2D DAFF layer at the interface. The properties of this layer are defined by canting and pinning of BFO spins at the interface with TMO due to Fe and Mn interaction. X-ray Magnetic Circular Dichroism (XMCD) confirms the presence of canted antiferromagnetic ordering of BiFeO 3 , charge transfer between Mn ions and different magnetically coupled layers which play vital role in getting the exchange bias.

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“…In comparison to pure BiFeO 3 (the parent phase), the presence of these bands is associated with the basal oxygen ions of the Mn 3+ O 6 octahedra, which are linked to Jahn-Teller (JT) distortion with apparition of orthorhombic symmetry. Further discussion regarding the development of these features when doping BFO with rare-earth manganite can be found in our prior research [30,31,36,37]. For instance, Ca-doped BiFeO 3 bulk materials are successfully refined by assuming a mixture of the rhombohedral R3c and orthorhombic Pnma space groups in the work of Sunil Chauhan et al [38].…”

Section: Microstructural and Structural Investigationmentioning

confidence: 99%

Magnetic, Antiferroelectric-like Behavior and Resistance Switching Properties in BiFeO3-CaMnO3 Polycrystalline Thin Films

Lahmar,

Zidani,

Belhadi

et al. 2023

Materials

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The effect of ferromagnetic CaMnO3 (CMO) addition to structural, magnetic, dielectric, and ferroelectric properties of BiFeO3 is presented. X-ray diffraction and Raman investigation allowed the identification of a single pseudocubic perovskite structure. The magnetic measurement showed that the prepared films exhibit a ferromagnetic behavior at a low temperature with both coercive field and remnant magnetization increased with increasing CMO content. However, a deterioration of magnetization was observed at room temperature. Ferroelectric study revealed an antiferroelectric-like behavior with a pinched P–E hysteresis loop for 5% CMO doping BFO, resulting in low remnant polarization and double hysteresis loops. Whereas, high remnant polarization and coercive field with a likely square hysteresis loop are obtained for 10% CMO addition. Furthermore, a bipolar resistive switching behavior with a threshold voltage of about 1.8 V is observed for high doped film that can be linked to the ferroelectric polarization switching.

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Sequence of structural transitions in BiFeO3–RMnO3 thin films (R=Rare earth)

Cited by 13 publications

References 20 publications

Enhanced magnetization in multiferroic nanocomposite Bi0.9Gd0.1Fe0.9Mn0.05X0.05O3 (X= Cr, Co) thin films

Enhanced magnetization in multiferroic nanocomposite Bi0.9Gd0.1Fe0.9Mn0.05X0.05O3 (X= Cr, Co) thin films

Room temperature exchange bias in antiferromagnetic composite BiFeO3-TbMnO3

Magnetic, Antiferroelectric-like Behavior and Resistance Switching Properties in BiFeO3-CaMnO3 Polycrystalline Thin Films

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