Ferromagnetism and ferroelectricity in epitaxial BiMnO3 ultra-thin films

Luca, G. M. De; Preziosi, Daniele; Chiarella, F.; Capua, R. Di; Gariglio, Stefano; Lettieri, S.; Salluzzo, M.

doi:10.1063/1.4818136

Cited by 46 publications

(47 citation statements)

References 26 publications

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“…In spite of theoretical predictions that did not find any tendency for ferroelectricity under epitaxial strain [73], ferroelectricity has been demonstrated in strained thin films with polarization values of 16-23 µC.cm −2 [74,75,76], and in La 0.1 Bi 0.9 MnO 3 films [77]. Another claim was made in [78], but the hysteresis loops presented are dominated by dielectric losses and do not prove the ferroelectric character.…”

Section: Coexistence Of Ferroelectricity and Jahn-teller Distortion: mentioning

confidence: 84%

Bismuth-based perovskites as multiferroics

Guennou

Viret

Kreisel

2015

Comptes Rendus. Physique

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This review devoted to multiferroic properties of Bismuth-based perovskites falls into two parts. The first part focuses on BiFeO 3 and summarizes the recent progress made in the studies of its pressure-temperature phase diagram and magnetoelectric coupling phenomena. The second part discusses in a more general way the issue of polar -and multiferroic -phases in BiBO 3 perovskites and the competition between ferroelectricity and other structural instabilities, from an inventory of recently synthetized compounds. RésuméMultiferroïcité dans les pérovskites au bismuth. Cette revue consacrée aux pérovskites multiferroïquesà base de bismuth BiBO 3 est scindée en deux parties. La première est consacrée au cas de BiFeO 3 et résume les progrès récents réalisés dans l'étude de son diagramme de phases pression-température, et de ses phénomènes de couplage magnéto-électrique. La seconde partie aborde de manière plus générale, a partir d'un inventaire des composés récemment synthétisés, la question de la stabilité des phases polaires -et multiferroiques -dans les pérovskites BiBO 3 et la compétition entre la ferroélectricité et les autres instabilités structurales.

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Section: Coexistence Of Ferroelectricity and Jahn-teller Distortion: mentioning

confidence: 84%

Bismuth-based perovskites as multiferroics

Guennou

Viret

Kreisel

2015

Comptes Rendus. Physique

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“…The scans show that all superlattices grew epitaxially on SrTiO 3 (STO), showing pseudocubic (001) pc refl ections. [ 31 ] No superlattice peaks from the multilayer were observed; however, this does not indicate the lack of a high quality SL-BFO/BMO structure since any minor interface roughening reduces the intensity of these peaks dramatically due to the small difference between scattering factors of BMO and BFO. A minor contribution of monoclinic BMO (<1%) was observed in all fi lms.…”

Section: Doi: 101002/admi201500597mentioning

confidence: 87%

“…It was found that the BMO did not grow layer-by-layer which could be expected since the growth is complicated by the highly volatile Bi as well as the large lattice mismatch between pseudocubic BMO and STO. [ 31 ] It is noted that the interface roughening of our superlattices increased with fi lm thickness as confi rmed by XRR.…”

Section: Methodsmentioning

confidence: 99%

“…The monoclinic phase could be expected to form as a result of strain relaxation. [ 31 ] For the superlattices with m = 4, 8, a minor contribution of Bi 2 O 3 was present. Note that the impurity phases were not observed by transmission electron microscopy (TEM).…”

Section: Doi: 101002/admi201500597mentioning

confidence: 99%

“…The substrate to target distance was fi xed at 12 cm to ensure a slow growth rate which was needed to maintain coherent growth. [ 31 ] During growth the substrate temperature was ≈640 °C and the oxygen pressure was fi xed at 100 mTorr. The fi lms were cooled down in 300 Torr O 2 by switching off the heater.…”

Section: Methodsmentioning

confidence: 99%

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Interface‐Coupled BiFeO₃/BiMnO₃ Superlattices with Magnetic Transition Temperature up to 410 K

Choi

Kleibeuker

Fix

et al. 2016

Adv Materials Inter

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polarization is very small (0.1 µ C cm −2 at ≈90 K) or it is even paraelectric. [ 4 ] In BFO, strong FE behavior (Ferroelectric transition temperature, T C,FE ≈ 1103 K) coexists together with antiferromagnetism (AFM). BFO has an incommensurate cycloidally modulated G-type AFM structure with a large period of 62 nm (Néel temperature, T N ≈ 650 K). [ 5,6 ] Despite having ferroelectric and magnetic ordering at high temperatures, BFO has drawbacks for practical applications. Most notably the weak FM-like magnetic behavior results from destruction of its incommensurate magnetic structure leading to AFM. [ 6 ] With strong ferromagnetic behavior in BMO and strong ferroelectric behavior in BFO, various studies have suggested combining BMO and BFO in order to achieve room-temperature (RT) multiferroicity. [7][8][9][10] One approach is to modify the local spin confi guration of Fe by chemical doping at the B -site. [ 8,9 ] By 50% doping, this simple concept could result in ordered double perovskite ferrites of Bi 3+ 2 Fe6 (TM = transition metal: Cr, Mn, Co, Ni, and Cu) giving antiferromagnetically coupled high spin state of the TM and Fe. However, this concept has not been widely realized due to the lack of cation ordering as a result of negligible differences in ionic valences and ionic radii. [11][12][13][14][15] On the other hand, disordered double perovskites (notably BiFe 0.5 Mn 0.5 O 3 (BFMO) and Bi 2 CoMnO 6 (BCMO)) show a strongly enhanced T C albeit with lower magnetic moment than expected for the ordered structure. [ 16,17 ] Pálová et al. extended the idea of ordered double perovskites by theoretically studying BFMO with an ordered nanoscale checkerboard structure (NCB-BFO/BMO, see Figure 1 a), i.e., columnar B -site ordering. [ 10 ] Their calculations predict that an ordered NCB-BFO/BMO would be ferroelectric and ferrimagnetic (FiM) with M S of 3.8 µ B /Fe-Mn pair and T C of 406 K, as a result of magnetic ordering arising from the superexchange coupling between the neighboring AFM-Fe and FM-Mn. [ 10 ] Unfortunately, spontaneous columnar B -site ordering is not expected and high quality growth of artifi cial 1:1 BFO/BMO superlattices along the 〈110〉 direction is very hard.

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The Polar/Antipolar Phase Boundary of BiMnO₃–BiFeO₃–PbTiO₃: Interplay among Crystal Structure, Point Defects, and Multiferroism

Fernández-Posada

Castro

Kiat

et al. 2018

Adv Funct Materials

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The ferromagnetic perovskite oxide BiMnO 3 is a highly topical material, and the solid solutions it forms with antiferromagnetic/ferroelectric BiFeO 3 and with ferroelectric PbTiO 3 result in distinctive polar/nonpolar morphotropic phase boundaries (MPBs). The exploitation of such a type of MPBs could be a novel approach to engineer novel multiferroics with phase-change magnetoelectric responses, in addition to ferroelectrics with enhanced electromechanical performance. Here, the interplay among crystal structure, point defects, and multiferroic properties of the BiMnO 3 -BiFeO 3 -PbTiO 3 ternary system at its line of MPBs between polymorphs of tetragonal P4mm (polar) and orthorhombic Pnma (antipolar) symmetries is reported. A strong dependence of the phase coexistence on thermal history is found: phase percentage significantly changes whether the material is quenched or slowly cooled from high temperature. The origin of this phenomenon is investigated with temperature-dependent structural and physical property characterizations. A major role of the complex defect chemistry, where a Bi/Pb-deficiency allows Mn and Fe ions to have a mixed-valence state, in the delicate balance between polymorphs is proposed, and its influence in the magnetic and electric ferroic orders is defined.

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Ferromagnetism and ferroelectricity in epitaxial BiMnO3 ultra-thin films

Cited by 46 publications

References 26 publications

Bismuth-based perovskites as multiferroics

Bismuth-based perovskites as multiferroics

Interface‐Coupled BiFeO₃/BiMnO₃ Superlattices with Magnetic Transition Temperature up to 410 K

The Polar/Antipolar Phase Boundary of BiMnO₃–BiFeO₃–PbTiO₃: Interplay among Crystal Structure, Point Defects, and Multiferroism

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Ferromagnetism and ferroelectricity in epitaxial BiMnO3 ultra-thin films

Cited by 46 publications

References 26 publications

Bismuth-based perovskites as multiferroics

Bismuth-based perovskites as multiferroics

Interface‐Coupled BiFeO3/BiMnO3 Superlattices with Magnetic Transition Temperature up to 410 K

The Polar/Antipolar Phase Boundary of BiMnO3–BiFeO3–PbTiO3: Interplay among Crystal Structure, Point Defects, and Multiferroism

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Product

Resources

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Interface‐Coupled BiFeO₃/BiMnO₃ Superlattices with Magnetic Transition Temperature up to 410 K

The Polar/Antipolar Phase Boundary of BiMnO₃–BiFeO₃–PbTiO₃: Interplay among Crystal Structure, Point Defects, and Multiferroism