Strong magnetoelastic effect on the magnetoelectric phenomena of TbMn<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow /><mml:mrow><mml:mn>2</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:math>O<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow /><mml:mrow><mml:mn>5</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:math>

Oh, Yoon Seok; Jeon, Byung Gu; Haam, S. Y.; Park, S.; Correa, V. F.; Lacerda, A.; Cheong, Sang‐Wook; Jeon, Gun Sang; Kim, Kee Hoon

doi:10.1103/physrevb.83.060405

Cited by 11 publications

(17 citation statements)

References 21 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…2 give direct access to P y I and P y II across the entire temperature range. In contrast to field and temperature dependent pyroelectric current measurements [7], which revealed changes in the order of 10%/T, the field dependent SHG data of P y I,II at fixed temperature (Figs. 3(a) and (b)) reveal no dependence on the magnetic field (with a noise level of the SHG data below 1%).…”

Section: Discussion: Microscopic Mechanismsmentioning

confidence: 59%

“…We now apply the same step-by-step analysis as in Section V with consecutive derivation of P y I , P y II , and P y III and the associated fit parameters according to Eq. (7). For this purpose, Fig.…”

Section: Magnetic-field Dependence Of the Polarizationmentioning

confidence: 99%

“…This leads to a complex temperature-and fielddependence of the magnetically induced polarization, including a sign change of P induced by a moderate magnetic field [3]. Phenomenological two-and threepolarization models were proposed to explain such features and the 3d − 4f interplay of the manganese and the terbium sublattices was scrutinized [7,8]. However, up to now an explicit disentanglement of individual contributions to the net polarization has not been accomplished because pyroelectric current measurements, the standard technique for measuring values in the order of 1 nC/cm 2 , can only reveal the spatially integrated net polarization.…”

mentioning

confidence: 99%

See 2 more Smart Citations

Independent ferroelectric contributions and rare-earth-induced polarization reversal in multiferroic TbMn2O5

et al. 2012

Self Cite

View full text Add to dashboard Cite

Three independent contributions to the magnetically induced spontaneous polarization of multiferroic TbMn 2 O 5 are uniquely separated by optical second harmonic generation and an analysis in terms of Landau theory. Two of the contributions are related to the magnetic Mn 3+/4+ order and are independent of applied fields µ 0 H x of up to ±7 T. The third contribution is related to the long-range antiferromagnetic Tb 3+ order. It shows a drastic decrease upon the application of a magnetic field and mediates the change of sign of the spontaneous electric polarization in TbMn 2 O 5 . The close relationship between the rare-earth long-range order and the non-linear optical properties points to isotropic Tb 3+ -Tb 3+ exchange and O 2− spin polarization as mechanism for this rare-earth induced ferroelectric contributions. 4-6A characteristic feature of the magnetically induced ferroelectrics is their complexity.Various mechanisms, demanding in themselves, cooperate for promoting the spontaneous polarization: geometric frustration, incommensurate spin order, low crystallographic symmetry, and electronic 3d − 4f interactions may all play a role. This inevitably results in rich magnetoelectric phase diagrams with a multiplicity of contributions to the ferroelectric polarization P . The situation culminates in compounds like TbMn 2 O 5 which hosts three magnetic subsystems and five different magnetically ordered phases. This leads to a complex temperature-and field-dependence of the magnetically induced polarization, including a sign change of P induced by a moderate magnetic field.3 Phenomenological two-and threepolarization models were proposed to explain such features and the 3d − 4f interplay of the manganese and the terbium sublattices was scrutinized. The four-dimensional irreducible representation associated with k leads to a ferroelectric polarization P y net along the y axis when δ x becomes zero in a second-order phase transition at T C ≡ T 2 = 38 K. Landau theory predicts a temperature dependence of the polarization according toIn a subsequent second-order phase transition at T 3 = 33 K commensurate magnetic lockin with δ x = δ z = 0 occurs. The predicted temperature dependence of the ferroelectric polarization is now described by the expressionHere, ε is a constant responsible for a change of slope of P y net (T ) at T 3 . In a first-order phase transition at T 4 = 22 K the magnetic order of TbMn 2 O 5 becomes incommensurate again with δ x = 0, δ z = 0. The first-order phase transition is parametrized by the emergence of now two four-dimensional order parameters whose coupling gives rise to an additional polarization contribution P y II withBecause of the pronounced decrease of P y net observed at T 4 the net polarization is expressed aswith ε 1,2 as proportionality factors. Finally, a second-order magnetic phase transition is observed at T 5 ≈ 10 K. Optical SHG describes the induction of a light wave at frequency 2ω by an incident light wave at frequency ω.16,17 This is expressed as S i (2ω) = ǫ 0 χ ij...

show abstract

Section: Discussion: Microscopic Mechanismsmentioning

confidence: 59%

Section: Magnetic-field Dependence Of the Polarizationmentioning

confidence: 99%

mentioning

confidence: 99%

See 1 more Smart Citation

Independent ferroelectric contributions and rare-earth-induced polarization reversal in multiferroic TbMn2O5

et al. 2012

Self Cite

View full text Add to dashboard Cite

show abstract

“…[e 3 ∧ Q] where Q is the wave vector propagation. For collinear magnets, Oh et al [64] successfully explained the magnetoelectric phenomena in TbMn 2 O 5 using a fourth order (P.M) 2 coupling term. …”

Section: Brief Description Of the Magnetoelectric Interplay In Rmno 3mentioning

confidence: 99%

Review of the Magnetocaloric Effect in RMnO3 and RMn2O5 Multiferroic Crystals

et al. 2017

View full text Add to dashboard Cite

Abstract:It is known that some of RMnO 3 and RMn 2 O 5 (R = rare earth) multiferroic crystals reveal a strong interplay between their magnetic and electric order parameters, paving the way for applications in spintronic technologies. Additionally, recent works have also pointed out their potential utilization as refrigerants in magnetocaloric cooling systems for cryogenic tasks. In this paper, recent advances regarding the magnetocaloric properties of both RMnO 3 and RMn 2 O 5 families of multiferroics are reviewed. With the aim of understanding the RMnO 3 and RMn 2 O 5 magnetocaloric features, their structural and magnetic properties are discussed. The physics behind the magnetocaloric effect as well as some of its key thermodynamic aspects are also considered.

show abstract

“…More specifically, the main mechanism for the appearance of a nontrivial polarization P in R Mn 2 O 5 ( R = Tb, Y, Dy, and Bi) has been attributed to exchange‐striction among frustrated Mn spin networks (), while a contribution to the polarization due to a spiral spin order is relevant in R Mn 2 O 5 ( R = Ho, Er, and Tm) (). The dominant mechanism for developing a non‐zero polarization in R Mn 2 O 5 seems to be associated with the order of the spins of Mn (). This fact is related to the complexity of the R Mn 2 O 5 crystal structure, where Mn 4+ O 6 octahedra and Mn 3+ O 5 pyramids are linked through edge‐ and corner‐sharing networks.…”

Section: Introductionmentioning

confidence: 99%

Microscopic approach to the magnetoelectric effect in R Mn₂ O₅

Bahoosh

Wesselinowa

Trimper

2013

Phys. Status Solidi B

View full text Add to dashboard Cite

The multiferroic behavior of rare‐earth manganites is studied within a microscopic model including a symmetry‐allowed magnetoelectric coupling between polarization and magnetization. The magnetic subsystem is described by a frustrated Heisenberg spin model, whereas the ferroelectric subsystem is characterized by an Ising model in a transverse field. Using Green's function method we find analytically the temperature and wave vector dependent elementary excitation of the magnetoelectric system, the polarization and the magnetization for different magnetoelectric coupling strengths. The system undergoes a magnetic transition at TN and a further reduction of the temperature leads to a ferroelectric transition at TC

show abstract

Strong magnetoelastic effect on the magnetoelectric phenomena of TbMn2O5

Cited by 11 publications

References 21 publications

Independent ferroelectric contributions and rare-earth-induced polarization reversal in multiferroic TbMn2O5

Independent ferroelectric contributions and rare-earth-induced polarization reversal in multiferroic TbMn2O5

Review of the Magnetocaloric Effect in RMnO3 and RMn2O5 Multiferroic Crystals

Microscopic approach to the magnetoelectric effect in R Mn₂ O₅

Contact Info

Product

Resources

About

Strong magnetoelastic effect on the magnetoelectric phenomena of TbMn2O5

Cited by 11 publications

References 21 publications

Independent ferroelectric contributions and rare-earth-induced polarization reversal in multiferroic TbMn2O5

Independent ferroelectric contributions and rare-earth-induced polarization reversal in multiferroic TbMn2O5

Review of the Magnetocaloric Effect in RMnO3 and RMn2O5 Multiferroic Crystals

Microscopic approach to the magnetoelectric effect in R Mn2 O5

Contact Info

Product

Resources

About

Microscopic approach to the magnetoelectric effect in R Mn₂ O₅