The magnetic structure of an epitaxial BiMn0.5Fe0.5O3 thin film on SrTiO3 (001) studied with neutron diffraction

Cortie, David; Stampfl, A. P. J.; Klose, F.; Du, Yi; Wang, X. L.; Kimura, Hideo; Cheng, Zhenxiang

doi:10.1063/1.4762818

Cited by 14 publications

(14 citation statements)

References 37 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…At present, only disordered BFMO bulk and films, in which Fe and Mn ions are randomly distributed at B sites, have been synthesized, and no convincing experimental evidence for Fe-Mn ordering along [111] direction is found [13,[16][17][18][19]. In addition, recent neutron diffraction experiment further confirmed Fe and Mn disordering at B sites at RT in BFMO epitaxial films [21].…”

Section: +mentioning

confidence: 99%

The preparation, and structural and multiferroic properties of B-site ordered double-perovskite Bi₂FeMnO₆

Sun

Fang

et al. 2017

J. Mater. Chem. C

View full text Add to dashboard Cite

Highly ordered Bi 2 FeMnO 6 epitaxial thin films have been successfully grown on SrTiO 3 substrate.Both high-flux synchrotron X-ray diffraction reciprocal space mapping and high resolution transmission electron microscopy confirmed the alternative alignment of Fe and Mn along [111] direction of Bi 2 FeMnO 6 films. Magnetic and ferroelectric properties of Bi 2 FeMnO 6 films are characterized and analyzed. The room-temperature ferroelectricity is well kept in Bi 2 FeMnO 6 film as expected.However, it is very interesting that Bi 2 FeMnO 6 film exhibits a typical spin-glass behavior and very weak magnetism rather than a ferri/ferromagnetism as generally believed. Our first-principles calculations suggest a spin frustration model for Bi 2 FeMnO 6 , which can well explain the intriguing magnetic property of Bi 2 FeMnO 6 film.

show abstract

Section: +mentioning

confidence: 99%

The preparation, and structural and multiferroic properties of B-site ordered double-perovskite Bi₂FeMnO₆

Sun

Fang

et al. 2017

J. Mater. Chem. C

View full text Add to dashboard Cite

show abstract

“…2 demonstrate that the compound exhibits a measurable weak-ferromagnetic signal, which results from a frustrated canted magnetic structure similar to the case known for BiMn 0.5 Fe 0.5 O 3 thin films [27]. The hysteresis shown in Fig.…”

Section: B Magnetic Propertiesmentioning

confidence: 69%

“…As such, the improved magnetic performance likely arises from fundamental perturbations of electron exchange interactions due to the inclusion of Mn ions on the Fe-ion B sites, which we studied in detail with a classical microstructural spin Hamiltonian model implemented via a Monte Carlo computer simulation. Despite its relative simplicity, the classical vector-spin model approach enables a larger scale investigation and, importantly, qualitatively reproduces the main physical observables found for the case of bulk BiFeO 3 , Bi 0.8 La 0.2 Fe 0.5 Mn 0.5 O 3 , and thinfilm-form BiMn 0.5 Fe 0.5 O 3 [27]. The reduced Néel temperature in BiMn 0.5 Fe 0.5 O 3 is primarily attributed to the reduction of average primary nearest-neighbor exchange forces due to the bonds formed in Mn-Fe and Mn-Mn regions.…”

Section: Discussionmentioning

confidence: 85%

See 1 more Smart Citation

Spin-cycloid instability as the origin of weak ferromagnetism in the disordered perovskiteBi0.8La0.2Fe0.5Mn0.5O

et al. 2014

Self Cite

View full text Add to dashboard Cite

Powder neutron diffraction and magnetometry studies have been conducted to investigate the crystallographic and magnetic structure of Bi0.8La0.2Fe0.5Mn0. 5O3. The compound stabilizes in the Imma orthorhombic crystal symmetry in the measured temperature range of 5 to 380 K, with a transition to antiferromagnetic order at TN≈240 K. The spin cycloid present for BiFeO3 is found to be absent with 50% Mn3+ cation substitution, leading to G-type antiferromagnetic order with an enhanced out-of-plane canted ferromagnetic component, evident from measurable weak-ferromagnetic hysteresis. Structural modifications do not solely explain this behavior, indicating that modified electron exchange interactions must be taken into account. A classical spin simulation was developed to investigate the effect of random substitution in a disordered pseudocubic perovskite. The calculations took into account the nearest-neighbor, next-nearestneighbor, and Dzyaloshinskii-Moriya interactions, along with the local spin anisotropy. Using this framework to extend the established Hamiltonian model for BiFeO3, we show that only certain types of perturbations at a magnetic defect and the surrounding molecular fields trigger a simultaneous collapse of cycloidal order and the emergence of the long-range weak-ferromagnetic component. By adopting values for the Mn molecular fields appropriate for REMnO3 (RE= rare earth), simulations of BiMn0.5Fe0.5O3 exhibit the key magnetic properties of our experimental observations. Powder neutron diffraction and magnetometry studies have been conducted to investigate the crystallographic and magnetic structure of Bi 0.8 La 0.2 Fe 0.5 Mn 0.5 O 3 . The compound stabilizes in the I mma orthorhombic crystal symmetry in the measured temperature range of 5 to 380 K, with a transition to antiferromagnetic order at T N ≈ 240 K. The spin cycloid present for BiFeO 3 is found to be absent with 50% Mn 3+ cation substitution, leading to G-type antiferromagnetic order with an enhanced out-of-plane canted ferromagnetic component, evident from measurable weak-ferromagnetic hysteresis. Structural modifications do not solely explain this behavior, indicating that modified electron exchange interactions must be taken into account. A classical spin simulation was developed to investigate the effect of random substitution in a disordered pseudocubic perovskite. The calculations took into account the nearest-neighbor, next-nearest-neighbor, and Dzyaloshinskii-Moriya interactions, along with the local spin anisotropy. Using this framework to extend the established Hamiltonian model for BiFeO 3 , we show that only certain types of perturbations at a magnetic defect and the surrounding molecular fields trigger a simultaneous collapse of cycloidal order and the emergence of the long-range weak-ferromagnetic component. By adopting values for the Mn molecular fields appropriate for REMnO 3 (RE = rare earth), simulations of BiMn 0.5 Fe 0.5 O 3 exhibit the key magnetic properties of our experimental observations.

show abstract

“…12 Neutron diffraction of BFMO thin film deposited on (001) SrTiO 3 (STO) substrate suggested the absence of the cycloid AFM structure and a random distribution of Mn and Fe ions over B-sites. 13 The strained BFMO thin film grown on (001) STO substrate also shows strong enhancement of the magnetization and the magnetic transition temperature. 14 Thus, it is highly important to further examine the strain effects of substrates on the epitaxial growth, microstructure, and dielectric properties of BFMO thin films.…”

mentioning

confidence: 99%

Anisotropy of crystal growth mechanisms, dielectricity, and magnetism of multiferroic Bi2FeMnO6 thin films

Liu

Cheng

et al. 2013

Journal of Applied Physics

Self Cite

View full text Add to dashboard Cite

Epitaxial Bi2FeMnO6 (BFMO) thin films deposited on various Nb:SrTiO3 substrates show that the lattice parameters are very sensitive to epitaxial strains. Compressive and tensile strains are induced to the in-plane lattice constants of the (100) and (111) oriented films, respectively, while that of the (110) oriented thin film stay unstrained. The thin films also exhibit a strongly anisotropic growth habit depending on the substrate. Spiral growth, such as in the (100) BFMO film, is unique in samples prepared by pulsed laser deposition. Extrinsic dielectric constants at low frequencies are attributed to oxygen vacancies via the Maxwell-Wagner effect. All the samples show saturated hysteresis loops with very small coercive fields at 200 K, indicating the presence of weak ferromagnetism.

show abstract

The magnetic structure of an epitaxial BiMn0.5Fe0.5O3 thin film on SrTiO3 (001) studied with neutron diffraction

Cited by 14 publications

References 37 publications

The preparation, and structural and multiferroic properties of B-site ordered double-perovskite Bi₂FeMnO₆

The preparation, and structural and multiferroic properties of B-site ordered double-perovskite Bi₂FeMnO₆

Spin-cycloid instability as the origin of weak ferromagnetism in the disordered perovskiteBi0.8La0.2Fe0.5Mn0.5O

Anisotropy of crystal growth mechanisms, dielectricity, and magnetism of multiferroic Bi2FeMnO6 thin films

Contact Info

Product

Resources

About

The magnetic structure of an epitaxial BiMn0.5Fe0.5O3 thin film on SrTiO3 (001) studied with neutron diffraction

Cited by 14 publications

References 37 publications

The preparation, and structural and multiferroic properties of B-site ordered double-perovskite Bi2FeMnO6

The preparation, and structural and multiferroic properties of B-site ordered double-perovskite Bi2FeMnO6

Spin-cycloid instability as the origin of weak ferromagnetism in the disordered perovskiteBi0.8La0.2Fe0.5Mn0.5O

Anisotropy of crystal growth mechanisms, dielectricity, and magnetism of multiferroic Bi2FeMnO6 thin films

Contact Info

Product

Resources

About

The preparation, and structural and multiferroic properties of B-site ordered double-perovskite Bi₂FeMnO₆

The preparation, and structural and multiferroic properties of B-site ordered double-perovskite Bi₂FeMnO₆