Magnetoelastic properties of multiferroic hexagonal ErMnO3

Fernández-Posada, Carmen M.; Haines, Charles R. S.; Evans, Donald M.; Yan, Z.; Bourret, Edith; Meier, Dennis; Carpenter, Michael A.

doi:10.1016/j.jmmm.2022.169277

Cited by 10 publications

(6 citation statements)

References 70 publications

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“…It can be seen from the table that θ D values increase with enhanced ionic radii of rare earth ions. Lattice stiffening as evident from behavior of Debye temperature is earlier observed in ferrites and manganites [14,15].…”

Section: Resultssupporting

confidence: 53%

Electrical Resistivity Behavior and Small Polaron Conduction Transport Mechanism in Semiconducting RMnO3 Manganites

Kumar,

Sharma,

Fujun

et al. 2024

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Rare earth manganites, denoted by the chemical formula RMnO3, where R signifies a rare earth element, have garnered significant interest in recent years. These perovskite oxides exhibit intriguing phenomena such as multiferroicity, ferroelectricity, and colossal magnetoresistance, primarily attributed to the role of polarons in conduction. The incorporation of rare earth ions imparts flexibility, making these compounds promising for applications in spintronics, sensors, and information storage devices. This study delves into the electrical resistivity behavior and Small Polaron Conduction (SPC) mechanisms of rare earth manganites, particularly RMnO3. In this manuscript, electrical resistivity of the pristine RMnO3 (R = Sm, Eu, Gd) manganites are analyzed within the framework of adiabatic nearest-neighbor hopping of SPC. The high temperature state of RMnO3 within the SPC mechanism is influenced by polaron concentration, hopping distance, and resistivity coefficient. The localized charge carriers in undoped manganites enable one to estimate the activation energy for the electrical conduction. The activation energy decreases with the decrease in ionic radii from Sm to Gd. Deduced polaron activation energy is low for GdMnO3 as compared to SmMnO3 and is attributed to reducing disorder state in GdMnO3 as compared to SmMnO3. This work contributes to the fundamental understanding of condensed matter physics and the potential applications of rare earth manganites in emerging technologies. The interplay between electrical resistivity and Small Polaron Conduction offers insights for customizing these materials for specific technological needs.

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Section: Resultssupporting

confidence: 53%

Electrical Resistivity Behavior and Small Polaron Conduction Transport Mechanism in Semiconducting RMnO3 Manganites

Kumar,

Sharma,

Fujun

et al. 2024

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“…[ 11 ] In contrast to these materials, ErMnO 3 is co‐elastic (not ferroelastic) and, hence, cannot simply release elastic strain by inserting or removing domain walls. [ 50 ] Note that the scaling behavior observed in our polycrystalline ErMnO 3 is opposite to classical Kittel scaling, which says that the domain width in thin films is inversely proportional to one over the square root of their thickness. [ 51 ]…”

Section: Inverse Grain Size‐dependent Domain Scaling Behaviormentioning

confidence: 91%

Confinement‐Driven Inverse Domain Scaling in Polycrystalline ErMnO₃

et al. 2022

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The ORCID identification number(s) for the author(s) of this article can be found under https://doi.org/10.1002/adma.202203449.Ternary hexagonal manganites, RMnO 3 (R = Sc, Y, In, and Dy-Lu), have been intensively studied as model system for improper ferroelectricity. [19] In contrast to proper ferroelectrics, The research on topological phenomena in ferroelectric materials has revolutionized the way people understand polar order. Intriguing examples are polar skyrmions, vortex/anti-vortex structures, and ferroelectric incommensurabilties, which promote emergent physical properties ranging from electricfield-controllable chirality to negative capacitance effects. Here, the impact of topologically protected vortices on the domain formation in improper ferroelectric ErMnO 3 polycrystals is studied, demonstrating inverted domain scaling behavior compared to classical ferroelectrics. It is observed that as the grain size increases, smaller domains are formed. Phase field simulations reveal that elastic strain fields drive the annihilation of vortex/anti-vortex pairs within the grains and individual vortices at the grain boundaries. The inversion of the domain scaling behavior has far-reaching implications, providing fundamentally new opportunities for topology-based domain engineering and the tuning of the electromechanical and dielectric performance of ferroelectrics in general.

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“…A key benefit of using RUS to determine elastic properties is that the full elastic tensor of the material can be obtained at temperatures as low as 1.5 K [5] and as high as 1800 K [6]. From analysis of the elastic tensor, the elastic properties can be defined in any chosen direction.…”

Section: Introductionmentioning

confidence: 99%

Elasticity, acoustic loss and γ′ dissolution in superalloys from resonant ultrasound spectroscopy

Driver,

Markanday,

Christofidou

et al. 2024

Materials Science and Technology

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The high temperature acoustic loss and elastic moduli of the Ni-based superalloys RR1000, Waspaloy, and Allvac® 718Plus™ were investigated using resonant ultrasound spectroscopy. An exponential increase in acoustic loss was seen in all alloys, which was viscoelastic in character with an activation energy of ∼ 200–400 kJ.mol−1, similar to that of the self-diffusion of Ni. The magnitude of the loss was found to be proportional to d−0.85, where d is the grain size. Deviations from the high temperature background were seen in Waspaloy and 718Plus around their γ′ solvus temperatures, attributed to increased diffusion during γ′ dissolution. It is suggested that acoustic loss in Ni-based alloys may be used as a means of determining the γ′ solvus temperatures.

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Magnetoelastic properties of multiferroic hexagonal ErMnO3

Cited by 10 publications

References 70 publications

Electrical Resistivity Behavior and Small Polaron Conduction Transport Mechanism in Semiconducting <I>R</I>MnO<sub>3</sub> Manganites

Electrical Resistivity Behavior and Small Polaron Conduction Transport Mechanism in Semiconducting <I>R</I>MnO<sub>3</sub> Manganites

Confinement‐Driven Inverse Domain Scaling in Polycrystalline ErMnO₃

Elasticity, acoustic loss and γ′ dissolution in superalloys from resonant ultrasound spectroscopy

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Magnetoelastic properties of multiferroic hexagonal ErMnO3

Cited by 10 publications

References 70 publications

Electrical Resistivity Behavior and Small Polaron Conduction Transport Mechanism in Semiconducting &lt;I&gt;R&lt;/I&gt;MnO&lt;sub&gt;3&lt;/sub&gt; Manganites

Electrical Resistivity Behavior and Small Polaron Conduction Transport Mechanism in Semiconducting &lt;I&gt;R&lt;/I&gt;MnO&lt;sub&gt;3&lt;/sub&gt; Manganites

Confinement‐Driven Inverse Domain Scaling in Polycrystalline ErMnO3

Elasticity, acoustic loss and γ′ dissolution in superalloys from resonant ultrasound spectroscopy

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Product

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Electrical Resistivity Behavior and Small Polaron Conduction Transport Mechanism in Semiconducting <I>R</I>MnO<sub>3</sub> Manganites

Electrical Resistivity Behavior and Small Polaron Conduction Transport Mechanism in Semiconducting <I>R</I>MnO<sub>3</sub> Manganites

Confinement‐Driven Inverse Domain Scaling in Polycrystalline ErMnO₃