Ferroelectricity and weak ferromagnetism of hexagonal<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:mi>ErFe</mml:mi><mml:msub><mml:mi mathvariant="normal">O</mml:mi><mml:mn>3</mml:mn></mml:msub></mml:mrow></mml:math>thin films

Yokota, Hiroko; Nozue, Tomoya; Nakamura, Shigenari; Hōjō, H.; Fukunaga, Masao; Janolin, Pierre‐Eymeric; Kiat, J. M.; Fuwa, Akio

doi:10.1103/physrevb.92.054101

Cited by 44 publications

(31 citation statements)

References 46 publications

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“…It is to be noted that in ErFeO 3 films with a defined structure grown by pulsed laser deposition, certain magnetization-field hysteresis was registered at 130 K at the highest. 5 Further, in the films grown in the present study, the monotonic relationship between the Er/Fe cation ratio and the magnetization was not recognized (see Figure 3). The Er–Fe–O films deposited by ALD earlier 8 have demonstrated a somewhat analogous magnetization-field behavior with saturation magnetization not exceeding 30% from that of iron oxide.…”

Section: Results and Discussioncontrasting

confidence: 60%

Magnetic and Electrical Performance of Atomic Layer Deposited Iron Erbium Oxide Thin Films

et al. 2017

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Mixed films of a high-permittivity oxide, Er 2 O 3 , and a magnetic material, Fe 2 O 3 , were grown by atomic layer deposition on silicon and titanium nitride at 375 °C using erbium diketonate, ferrocene, and ozone as precursors. Crystalline phases of erbium and iron oxides were formed. Growth into three-dimensional trenched structures was demonstrated. A structure deposited using tens to hundreds subsequent cycles for both constituent metal oxide layers promoted both charge polarization and saturative magnetization compared to those in the more homogeneously mixed films.

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Section: Results and Discussioncontrasting

confidence: 60%

Magnetic and Electrical Performance of Atomic Layer Deposited Iron Erbium Oxide Thin Films

et al. 2017

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“…Recently, it has been shown that hexagonal ferrite family h-RFeO3 (R = rare earth ions, Y), the so-called improper ferroelectrics, provides another approach to achieving high-T multiferroicity [8][9][10][11][12][13][14][15], because of the stronger Fe 3+ spin exchanges in RFeO3 compared to the Mn 3+ spin exchanges in RMnO3. In this family, h-RFeO3 is ferroelectric at room temperature, and ferroelectric (FE) polarization (P) is generally introduced by the structural distortion in association with transition from high-T non-polar P63/mmc phase to low-T polar P63cm phase, e.g.…”

Section: Introductionmentioning

confidence: 99%

Magnetic structure and multiferroicity of Sc-substituted hexagonal YbFeO3

et al. 2021

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Hexagonal rare-earth ferrite RFeO3 family represents a unique class of multiferroics exhibiting weak ferromagnetism, and a strong coupling between magnetism and structural trimerization is predicted. However, the hexagonal structure for RFeO3 remains metastable in conventional condition. We have succeeded in stabilizing the hexagonal structure of polycrystalline YbFeO3 by partial Sc substitution of Yb. Using bulk magnetometry and neutron diffraction, we find that Yb0.42Sc0.58FeO3 orders into a canted antiferromagnetic state with the Néel temperature TN ~ 165 K, below which the Fe 3+ moments form the triangular configuration in the ab-plane and their in-plane projections are parallel to the [100] axis, consistent with magnetic space group P63c'm'. It is determined that the spin-canting is aligned along the c-axis, giving rise to the weak ferromagnetism. Furthermore, the Fe 3+ moments reorient toward a new direction below reorientation temperature TR ~ 40 K, satisfying magnetic subgroup P63, while the Yb 3+ moments order independently and ferrimagnetically along the c-axis at the characteristic temperature TYb ~ 15 K. Interestingly, reproducible modulation of electric polarization induced by magnetic field at low temperature is achieved, suggesting that the delicate structural distortion associated with two-up/one-down buckling of the Yb/Sc-planes and tilting of the FeO5 bipyramids may mediate the coupling between ferroelectric and magnetic orders under magnetic field. The present work represents a substantial progress to search for high-temperature multiferroics in hexagonal ferrites and related materials.

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“…Rare-earth orthoferrites materials RFeO 3 (R= rareearth ion), have shown potential for technologically relevant applications via observation of spin switching, spontaneous exchange bias and optically controlled ultrafast spin dynamics [1][2][3][4][5][6][7]. Additional important properties include large linear magneto-dielectric effect, spontaneous ferroelectric polarization, mutilferroicity, and magnetocaloric effect [8][9][10][11][12][13].…”

Section: Introductionmentioning

confidence: 99%

“…The concurrence of centero-symmetric space group of Fe 3+ sublattice along with centero-asymmetric space group of Er 3+ opens the possibility of improper polarization along with magnetic ordering and hence multiferroicity in ErFeO 3 [8]. Yokota et al [11] observed the coexistence of ferroelectricity and magnetism in ErFeO 3 thin films by modification of structure from orthorhombic to hexagonal via yttria stabilized zirconia substrate.…”

Section: Introductionmentioning

confidence: 99%

Coexisting magnetic structures and spin-reorientation in Er$_{0.5}$Dy$_{0.5}$FeO$_{3}$: Bulk magnetization, neutron scattering, specific heat, and \emph{Ab-initio} studies

Rajput,

Balasubramanian,

Singh

et al. 2021

Preprint

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The complex magnetic structures, spin-reorientation and correlated exchange interactions have been investigate in Er0.5Dy0.5FeO3 using bulk magnetization, neutron diffraction, specific heat measurements and density functional theory calculations. The Fe 3+ spins order as G-type antiferromagnet structure depicted by Γ4(Gx, Ay, Fz) irreducible representation below 700 K, similar to its end compounds. The bulk magnetization data indicate occurrence of the spin-reorientation and rare-earth magnetic ordering below ∼75 K and 10 K, respectively. The neutron diffraction studies confirm an "incomplete" Γ4→ Γ2(Fx, Cy, Gz) spin-reorientation initiated ≤75 K. Although, the relative volume fraction of the two magnetic structures varies with decreasing temperature, both co-exist even at 1.5 K. At 8 K, Er 3+ /Dy 3+ moments order as c R y arrangement develop, which gradually increases in intensity with decreasing temperature. At 2 K, magnetic structure associated with c R z arrangement of Er 3+ /Dy 3+ moments also appears. At 1.5 K the magnetic structure of Fe 3+ spins is represented by a combination of Γ2+Γ4+Γ1, while the rare earth moments coexists as c R y and c R z corresponding to Γ2 and Γ1 representation, respectively. The observed Schottky anomaly at 2.5 K suggests that the "rare-earth ordering" is induced by polarization due to Fe 3+ spins. The Er 3+ -Fe 3+ and Er 3+ -Dy 3+ exchange interactions, obtained from first principle calculations, primarily cause the complicated spin-reorientation and c R y rare-earth ordering, respectively, while the dipolar interactions between rare-earth moments, result in the c R z type rare-earth ordering at 2 K.

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Ferroelectricity and weak ferromagnetism of hexagonalErFeO3thin films

Cited by 44 publications

References 46 publications

Magnetic and Electrical Performance of Atomic Layer Deposited Iron Erbium Oxide Thin Films

Magnetic and Electrical Performance of Atomic Layer Deposited Iron Erbium Oxide Thin Films

Magnetic structure and multiferroicity of Sc-substituted hexagonal YbFeO3

Coexisting magnetic structures and spin-reorientation in Er$_{0.5}$Dy$_{0.5}$FeO$_{3}$: Bulk magnetization, neutron scattering, specific heat, and \emph{Ab-initio} studies

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