Nonreciprocal linear dichroism observed in electron spin resonance spectra of the magnetoelectric multiferroic 
<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:mi>Pb</mml:mi><mml:mrow><mml:mo>(</mml:mo><mml:mi>TiO</mml:mi><mml:mo>)</mml:mo></mml:mrow><mml:msub><mml:mi>Cu</mml:mi><mml:mn>4</mml:mn></mml:msub><mml:msub><mml:mrow><mml:mo>(</mml:mo><mml:msub><mml:mi>PO</mml:mi><mml:mn>4</mml:mn></mml:msub><mml:mo>)</mml:mo></mml:mrow><mml:mn>4</mml:mn></mml:msub></mml:mrow></mml:math>

Akaki, Mitsuru; Kimura, Kazuhiro; Kato, Yasuyuki; Sawada, Yoshinobu; Narumi, Yasuo; Ohta, H.; Kimura, T.; Motome, Yukitoshi; Hagiwara, Masayuki

doi:10.1103/physrevresearch.3.l042043

Cited by 4 publications

(3 citation statements)

References 24 publications

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“…This tuneable crystal structure, which reaches a highly symmetrical configuration in the (K; Nb) compound [36], was found by a range of thermodynamic measurements [36][37][38][39][40][41][42] to cause significant changes in the magnetic interactions. In fact most of these studies were inspired by the magnetoelectric behavior that results from ordering of the magnetic quadrupoles formed on the Cu 4 O 12 tetramers [37,43], and also leads to nonreciprocal optical properties [44,45]. Efforts to relate these properties to the structure and geometry of the different compounds have to date been based primarily on detailed magnetization measurements [38,39,41,46,47].…”

Section: Introductionmentioning

confidence: 99%

Spin dynamics in the square-lattice cupola system Ba(TiO)Cu$_4$(PO$_4$)$_4$

Testa,

Babkevich,

Kato

et al. 2022

Preprint

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We report high-resolution single-crystal inelastic neutron scattering measurements on the spin-1/2 antiferromagnet Ba(TiO)Cu4(PO4)4. This material is formed from layers of four-site "cupola" structures, oriented alternately upwards and downwards, which constitute a rather special realization of two-dimensional (2D) square-lattice magnetism. The strong Dzyaloshinskii-Moriya (DM) interaction within each cupola, or plaquette, unit has a geometry largely unexplored among the numerous studies of magnetic properties in 2D Heisenberg models with spin and spatial anisotropies. We have measured the magnetic excitations at zero field and in fields up to 5 T, finding a complex mode structure with multiple characteristic features that allow us to extract all the relevant magnetic interactions by modelling within the linear spin-wave approximation. We demonstrate that Ba(TiO)Cu4(PO4)4 is a checkerboard system with almost equal intra-and inter-plaquette couplings, in which the intra-plaquette DM interaction is instrumental both in enforcing robust magnetic order and in opening a large gap at the Brillouin-zone center. We place our observations in the perspective of generalized phase diagrams for spin-1/2 square-lattice models and materials, where exploring anisotropies and frustration as routes to quantum disorder remains a frontier research problem.

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Section: Introductionmentioning

confidence: 99%

Spin dynamics in the square-lattice cupola system Ba(TiO)Cu$_4$(PO$_4$)$_4$

Testa,

Babkevich,

Kato

et al. 2022

Preprint

Self Cite

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“…As a result, a peculiar type of nonreciprocal optical responses, called nonreciprocal linear dichroism (NLD), is observed both in (near‐)visible light [ 26 ] and terahertz regions. [ 27 ] In particular, the visible‐light NLD allows for a spatially resolved visualization of the antiferromagnetic domains using a polarized optical microscope. Moreover, it has been reported that a combination of the crystal chirality and the magnetoelectric quadrupole order leads to an anomalous chirality‐induced tilt of magnetization vector with respect to an applied magnetic field along the crystallographic X axis.…”

Section: Introductionmentioning

confidence: 99%

Chirality‐Dependent Magnetoelectric Responses in a Magnetic‐Field‐Induced Ferroelectric Phase of Pb(TiO)Cu₄(PO₄)₄

Kimura

Katsuyoshi

Miyake

et al. 2022

Adv Elect Materials

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Magnetoelectric multiferroic materials can exhibit a variety of functional properties such as electric field control of magnetization and nonreciprocal electromagnetic responses. Such a magnetoelectric response may be further enriched by the combination of the magnetoelectric order and a peculiar crystallographic order, such as crystal chirality. Recently, it was reported that a chiral‐lattice magnet Pb(TiO)Cu4(PO4)4 showing a magnetoelectric quadrupole order in its ground state exhibits anomalous chirality‐induced tilt of magnetization vector with respect to an applied magnetic field. In this progress report, additional results that advance the understanding of chirality‐induced tilt of magnetization vector are presented. It is found that chirality‐induced tilt of the magnetization vector also exists in a magnetic‐field‐induced ferroelectric (FI‐FE) phase of this compound that is stabilized in magnetic fields higher than 16 tesla. The resulting transverse component of the magnetization can be switched with an applied electric field through a polarization reversal. The analysis indicates that this transverse component is as large as ≈0.014 μB per f.u, suggesting that the tilting angle of the magnetization in the FI‐FE phase is much larger than that in the low‐field phase. Also, as another research progress, electric field control of nonreciprocal directional dichroism in the FI‐FE phase is demonstrated.

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“…This tuneable crystal structure, which reaches a highly symmetrical configuration in the (K; Nb) compound [36], was found by a range of thermodynamic measurements [36][37][38][39][40][41][42] to cause significant changes in the magnetic interactions. In fact, most of these studies were inspired by the magnetoelectric behavior that results from ordering of the magnetic quadrupoles formed on the Cu 4 O 12 tetramers [37,43], and also leads to nonreciprocal optical properties [44,45]. Efforts to relate these properties to the structure and geometry of the different compounds have to date been based primarily on detailed magnetization measurements [38,39,41,46,47].…”

Section: Introductionmentioning

confidence: 99%

Spin dynamics in the square-lattice cupola system Ba(TiO)Cu4(PO4)4

et al. 2022

Self Cite

View full text Add to dashboard Cite

We report high-resolution single-crystal inelastic neutron scattering measurements on the spin-1/2 antiferromagnet Ba(TiO)Cu 4 (PO 4 ) 4 . This material is formed from layers of four-site "cupola" structures, oriented alternately upwards and downwards, which constitute a rather special realization of two-dimensional (2D) square-lattice magnetism. The strong Dzyaloshinskii-Moriya (DM) interaction within each cupola, or plaquette, unit has a geometry largely unexplored among the numerous studies of magnetic properties in 2D Heisenberg models with spin and spatial anisotropies. We have measured the magnetic excitations at zero field and in fields up to 5 T, finding a complex mode structure with multiple characteristic features that allow us to extract all the relevant magnetic interactions by modeling within the linear spin-wave approximation. We demonstrate that Ba(TiO)Cu 4 (PO 4 ) 4 is a checkerboard system with almost equal intra-and interplaquette couplings, in which the intraplaquette DM interaction is instrumental both in enforcing robust magnetic order and in opening a large gap at the Brillouin-zone center. We place our observations in the perspective of generalized phase diagrams for spin-1/2 square-lattice models and materials, where exploring anisotropies and frustration as routes to quantum disorder remains a frontier research problem.

show abstract

Nonreciprocal linear dichroism observed in electron spin resonance spectra of the magnetoelectric multiferroic Pb(TiO)Cu4(PO4)4

Cited by 4 publications

References 24 publications

Spin dynamics in the square-lattice cupola system Ba(TiO)Cu$_4$(PO$_4$)$_4$

Spin dynamics in the square-lattice cupola system Ba(TiO)Cu$_4$(PO$_4$)$_4$

Chirality‐Dependent Magnetoelectric Responses in a Magnetic‐Field‐Induced Ferroelectric Phase of Pb(TiO)Cu₄(PO₄)₄

Spin dynamics in the square-lattice cupola system Ba(TiO)Cu4(PO4)4

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Nonreciprocal linear dichroism observed in electron spin resonance spectra of the magnetoelectric multiferroic Pb(TiO)Cu4(PO4)4

Cited by 4 publications

References 24 publications

Spin dynamics in the square-lattice cupola system Ba(TiO)Cu$_4$(PO$_4$)$_4$

Spin dynamics in the square-lattice cupola system Ba(TiO)Cu$_4$(PO$_4$)$_4$

Chirality‐Dependent Magnetoelectric Responses in a Magnetic‐Field‐Induced Ferroelectric Phase of Pb(TiO)Cu4(PO4)4

Spin dynamics in the square-lattice cupola system Ba(TiO)Cu4(PO4)4

Contact Info

Product

Resources

About

Chirality‐Dependent Magnetoelectric Responses in a Magnetic‐Field‐Induced Ferroelectric Phase of Pb(TiO)Cu₄(PO₄)₄