Magnetoelectric Coupling through the Spin Flop Transition in<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi>Ni</mml:mi></mml:mrow><mml:mrow><mml:mn>3</mml:mn></mml:mrow></mml:msub><mml:msub><mml:mrow><mml:mi>TeO</mml:mi></mml:mrow><mml:mrow><mml:mn>6</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:math>

Yokosuk, Michael O.; al-Wahish, Amal; Artyukhin, Sergey; O’Neal, Kenneth; Mazumdar, Dipanjan; Chen, P.; Yang, Junjie; Oh, Yoon Seok; McGill, Stephen; Haule, Kristjan; Cheong, S.-W.; Vanderbilt, David; Musfeldt, J. L.

doi:10.1103/physrevlett.117.147402

Cited by 31 publications

(26 citation statements)

References 20 publications

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“…We find 10Dq = 2.33 eV and B = 0.86 eV for Sr 3 CuIrO 6 [41]. As summarized in Table 1, these values are similar to other Ir 4+containing materials including Sr 2 IrO 4 and Li 2 IrO 3 [51][52][53] but much higher than prototypical transition metal oxides like α-Fe 2 O 3 [54] and even the 3d/4p hybrid Ni 3 TeO 6 [55]. We attribute this difference to the heavy mass of the Ir center, which is predicted to increase spinorbit coupling and Racah parameters in free ions [56].…”

Section: Electron-phonon Coupling and Strength Of The Crystal Field Isupporting

confidence: 76%

Spin–lattice and electron–phonon coupling in 3d/5d hybrid Sr3NiIrO6

et al. 2019

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While 3d-containing materials display strong electron correlations, narrow band widths, and robust magnetism, 5d systems are recognized for strong spin-orbit coupling, increased hybridization, and more diffuse orbitals. Combining these properties leads to novel behavior. Sr3NiIrO6, for example, displays complex magnetism and ultra-high coercive fields -up to an incredible 55 T. Here, we combine infrared and optical spectroscopies with high-field magnetization and first principles calculations to explore the fundamental excitations of the lattice and related coupling processes including spin-lattice and electron-phonon mechanisms. Magneto-infrared spectroscopy reveals spin-lattice coupling of three phonons that modulate the Ir environment to reduce the energy required to modify the spin arrangement. While these modes primarily affect exchange within the chains, analysis also uncovers important inter-chain motion. This provides a mechanism by which inter-chain interactions can occur in the developing model for ultra-high coercivity. At the same time, analysis of the on-site Ir 4+ excitations reveals vibronic coupling and extremely large crystal field parameters that lead to a t2g-derived low-spin state for Ir. These findings highlight the spin-chargelattice entanglement in Sr3NiIrO6 and suggest that similar interactions may take place in other 3d/5d hybrids. * musfeldt@utk.edu shifts in orbital energies, combined with spin-orbit and bandwidth effects, can drive band inversions leading to topological phases and enhanced Rashba splittings [12][13][14][15]. In contrast, 3d transition metal compounds typically display much narrower bandwidths, more robust magnetism, and stronger electron-electron interactions, and correlations [16,17]. When these two sets of properties are brought together, as in Sr 3 NiIrO 6 , new and potentially useful behaviors can emerge.What makes Sr 3 NiIrO 6 so remarkable is the extraordinary coercivity -up to 55 T depending on sample details [18]. By contrast, traditional hard magnets like Fe/Pt, Nd 31−x Dy x Fe bal Co 2 B 1 (x = 7 wt %), and LuFe 2 O 4 have coercivities on the order of 1, 3, and 9 T, respectively [19][20][21]. The extraordinarily high coercive field is not due to ferromagnetic domains since the material is antiferromagnetic, though the exact mechanism arXiv:1907.09392v1 [cond-mat.mtrl-sci]

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Section: Electron-phonon Coupling and Strength Of The Crystal Field Isupporting

confidence: 76%

Spin–lattice and electron–phonon coupling in 3d/5d hybrid Sr3NiIrO6

et al. 2019

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“…Our phenomenological model also shows that spin-flops accompany orbitalflops due to strong spin-orbit coupling. The spin-flops in CeSb is induced by rotating magnetic field and differs from the classic spin-flops widely observed in antiferromagnets [36,37,[45][46][47][48].…”

Section: Discussionmentioning

confidence: 68%

Orbital-flop Induced Magnetoresistance Anisotropy in Rare Earth Monopnictide CeSb

Bao

et al. 2019

Nat Commun

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The charge and spin of the electrons in solids have been extensively exploited in electronic devices and in the development of spintronics. Another attribute of electrons—their orbital nature—is attracting growing interest for understanding exotic phenomena and in creating the next-generation of quantum devices such as orbital qubits. Here, we report on orbital-flop induced magnetoresistance anisotropy in CeSb. In the low temperature high magnetic-field driven ferromagnetic state, a series of additional minima appear in the angle-dependent magnetoresistance. These minima arise from the anisotropic magnetization originating from orbital-flops and from the enhanced electron scattering from magnetic multidomains formed around the first-order orbital-flop transition. The measured magnetization anisotropy can be accounted for with a phenomenological model involving orbital-flops and a spin-valve-like structure is used to demonstrate the viable utilization of orbital-flop phenomenon. Our results showcase a contribution of orbital behavior in the emergence of intriguing phenomena.

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“…15,16 and Kim et al . 17 used extremely high magnetic fields to elucidate the spin-induced electric polarization properties between 9 and 52 T. In a nominal magnetic field, NTO is a collinear antiferromagnet below ~52 K (Néel temperature: T N ) 15 , as revealed by anisotropic magnetization and specific heat capacity measurements 12,13 . Yokosuk et al .…”

Section: Introductionmentioning

confidence: 95%

“…Figure 1(c) displays all these spin exchange paths. The unique noncentrosymmetric structure and variation in exchange interaction with various Ni spin sites together give rise to the favorable magnetic field-driven electric polarization properties of NTO 15–17 . Yokosuk et al .…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, the origin of all of the aforementioned exotic properties of NTO is believed to be closely associated with the intriguing interplay between the Ni 3 d electron’s spin, orbital, charge and lattice-related degrees of freedom, which could lead to intriguing magnetic properties, such as the existence of FM and AFM interactions with the spin-axis parallel to the crystallographic c -axis in NTO 27–30 . Although the spin orientations of Ni 12,14,16 and the spin-phonon coupling in NTO 15,16,18 have recently been studied, the spin-orbit-lattice-charge intercorrelations have not yet been fully explored, to the best of our knowledge. Therefore, this investigation is a detailed study of the temperature- and polarization-dependent electronic and atomic structure of NTO, as well as of the preferential orbital and anisotropic magnetic behaviors, to elucidate correlations among the aforementioned degrees of freedom across the transition temperature of the NTO single crystal.…”

Section: Introductionmentioning

confidence: 99%

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Anisotropy in the magnetic interaction and lattice-orbital coupling of single crystal Ni3TeO6

Ghosh

Chen

Qiu

et al. 2018

Sci Rep

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This investigation reports on anisotropy in the magnetic interaction, lattice-orbital coupling and degree of phonon softening in single crystal Ni3TeO6 (NTO) using temperature- and polarization-dependent X-ray absorption spectroscopic techniques. The magnetic field-cooled and zero-field-cooled measurements and temperature-dependent Ni L3,2-edge X-ray magnetic circular dichroism spectra of NTO reveal a weak Ni-Ni ferromagnetic interaction close to ~60 K (TSO: temperature of the onset of spin ordering) with a net alignment of Ni spins (the uncompensated components of the Ni moments) along the crystallographic c-axis, which is absent from the ab-plane. Below the Néel temperature, TN~ 52 K, NTO is stable in the antiferromagnetic state with its spin axis parallel to the c-axis. The Ni L3,2-edge X-ray linear dichroism results indicate that above TSO, the Ni 3d eg electrons preferentially occupy the out-of-plane 3d3z2−r2 orbitals and switch to the in-plane 3dx2−y2 orbitals below TSO. The inherent distortion of the NiO6 octahedra and anisotropic nearest-neighbor Ni-O bond lengths between the c-axis and the ab-plane of NTO, followed by anomalous Debye-Waller factors and orbital-lattice in conjunction with spin-phonon couplings, stabilize the occupied out-of-plane (3d3z2−r2) and in-plane (3dx2−y2) Ni eg orbitals above and below TSO, respectively.

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Magnetoelectric Coupling through the Spin Flop Transition inNi3TeO6

Cited by 31 publications

References 20 publications

Spin–lattice and electron–phonon coupling in 3d/5d hybrid Sr3NiIrO6

Spin–lattice and electron–phonon coupling in 3d/5d hybrid Sr3NiIrO6

Orbital-flop Induced Magnetoresistance Anisotropy in Rare Earth Monopnictide CeSb

Anisotropy in the magnetic interaction and lattice-orbital coupling of single crystal Ni3TeO6

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