Magnetic order in the frustrated Ising-like chain compound<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:msub><mml:mi>Sr</mml:mi><mml:mn>3</mml:mn></mml:msub><mml:mi>Ni</mml:mi><mml:mi>Ir</mml:mi><mml:msub><mml:mi mathvariant="normal">O</mml:mi><mml:mn>6</mml:mn></mml:msub></mml:math>

Chapon, L. C.; Simonet, Virginie; Léjay, P.; Khalyavin, D. D.; Rayaprol, Sudhindra; Sampathkumaran, E. V.; Ballou, R.; Adroja, D. T.

doi:10.1103/physrevb.90.014408

Cited by 30 publications

(53 citation statements)

References 28 publications

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“…Moreover, no structural change was seen at either T 1 or T 2 [13,15]. In conjunction with the magnetization results, neutronscattering data for the low-temperature phases of Sr 3 NiIrO 6 and Sr 3 CoIrO 6 have been interpreted either in terms of amplitude-modulated antiferromagnetism or as a partiallydisordered antiferromagnetic (PDA) state [15,16]. Such PDA states, proposed by Mekata [24], were first reported for the A 3 BB O 6 family in Ref.…”

Section: Introductionmentioning

confidence: 58%

“…However, no heat capacity signature of the magnetic ordering has been observed in either Sr 3 NiIrO 6 or Sr 3 CoIrO 6 , suggesting a gradual onset of partially disordered magnetism [16,17]. Moreover, no structural change was seen at either T 1 or T 2 [13,15]. In conjunction with the magnetization results, neutronscattering data for the low-temperature phases of Sr 3 NiIrO 6 and Sr 3 CoIrO 6 have been interpreted either in terms of amplitude-modulated antiferromagnetism or as a partiallydisordered antiferromagnetic (PDA) state [15,16].…”

Section: Introductionmentioning

confidence: 94%

“…Magnetic frustration is intrinsic to such a structure, and can result from antiferromagnetic interactions within the triangular lattice in the ab plane, and from frustration between nearest-neighbor and next-nearest-neighbor interactions along the c-axis chains [11,14,[19][20][21]. Experimentally, this is manifested in the complex behavior of the magnetic susceptibilities of Sr 3 CoIrO 6 [15,16] and Sr 3 NiIrO 6 [13,[15][16][17] and their structurally similar relatives Ca 3 CoRhO 6 [22] and Sr 3 NiRhO 6 [23]; below a temperature conventionally [15] labeled T 1 , the susceptibility rises strongly; at a temperature T 2 , a factor ≈3-5 lower than T 1 , the spin dynamics are frozen in, and slow relaxation of magnetic properties [17] is observed. (As will be shown in Sec.…”

Section: Introductionmentioning

confidence: 99%

“…[13][14][15][16][17][18]). The salient structural details [11,13,15,18] are shown in Figs. 1(a) and 1(b) for Sr 3 NiIrO 6 .…”

Section: Introductionmentioning

confidence: 99%

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Magnetic properties ofSr3NiIrO6andSr3CoIrO6: Magnetic hysteresis with coercive fields of up to 55 T

et al. 2016

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We report extraordinarily large magnetic hysteresis loops in the iridates Sr 3 NiIrO 5 and Sr 3 CoIrO 6 . We find coercive magnetic fields of up to 55 T with switched magnetic moments ≈1 μ B per formula unit in Sr 3 NiIrO 6 and coercive fields of up to 52 T with switched moments ≈3 μ B per formula unit in Sr 3 CoIrO 6 . We propose that the magnetic hysteresis involves the field-induced evolution of quasi-one-dimensional chains in a frustrated triangular configuration. The striking magnetic behavior is likely to be linked to the unusual spin-orbit-entangled local state of the Ir 4+ ion and its potential for anisotropic exchange interactions.

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Section: Introductionmentioning

confidence: 58%

Section: Introductionmentioning

confidence: 94%

Section: Introductionmentioning

confidence: 99%

“…[13][14][15][16][17][18]). The salient structural details [11,13,15,18] are shown in Figs. 1(a) and 1(b) for Sr 3 NiIrO 6 .…”

Section: Introductionmentioning

confidence: 99%

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Magnetic properties ofSr3NiIrO6andSr3CoIrO6: Magnetic hysteresis with coercive fields of up to 55 T

et al. 2016

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“…This compound, where Ni and Ir are magnetically active, presents many similarities with Ca 3 Co 2 O 6 , with the spin-orbit anisotropy and the triangular arrangement in antiferromagnetically coupled chains, possibly at the origin of a loss of long-range ordering with decreasing temperature [8]. The most striking feature observed in Sr 3 NiIrO 6 is the largest coercive field anisotropy (55 T) measured to date [9].…”

Section: Published By the American Physical Society Under The Terms Omentioning

confidence: 99%

Magnetostriction-driven ground-state stabilization in 2H perovskites

et al. 2016

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The magnetic ground state of Sr 3 ARuO 6 , with A = (Li,Na), is studied using neutron diffraction, resonant x-ray scattering, and laboratory characterization measurements of high-quality crystals. Combining these results allows us to observe the onset of long-range magnetic order and distinguish the symmetrically allowed magnetic models, identifying in-plane antiferromagnetic moments and a small ferromagnetic component along the c axis. While the existence of magnetic domains masks the particular in-plane direction of the moments, it has been possible to elucidate the ground state using symmetry considerations. We find that due to the lack of local anisotropy, antisymmetric exchange interactions control the magnetic order, first through structural distortions that couple to in-plane antiferromagnetic moments and second through a high-order magnetoelastic coupling that lifts the degeneracy of the in-plane moments. The symmetry considerations used to rationalize the magnetic ground state are very general and will apply to many systems in this family, such as Ca 3 ARuO 6 , with A = (Li,Na), and Ca 3 LiOsO 6 whose magnetic ground states are still not completely understood.

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Magnetic Properties from the Perspectives of Electronic Hamiltonian

Whangbo

Xiang

2017

Handbook of Solid State Chemistry

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In this chapter, we review the quantitative and qualitative aspects of describing the properties of magnetic solids on the basis of electronic Hamiltonian that describes the energy states of a magnetic system using both orbital and spin degrees of freedom. To quantitatively discuss a magnetic property of a given magnetic system, one needs to generate the spectrum of its energy states and subsequently average the properties of these states with each state weighted by its Boltzmann distribution factor. Currently, this is an impossible task to achieve on the basis of an electronic Hamiltonian, so it is necessary to resort to a simple model Hamiltonian, that is, a spin Hamiltonian that describes the energy states of a magnetic system using only the spin degree of freedom. We show that a spin Hamiltonian approach becomes consistent with an electronic Hamiltonian approach if the spin lattice and its associated spin exchange parameters, to be used for the spin Hamiltonian, are determined by the energy‐mapping analysis based onDFTcalculations. The preferred spin orientation (i.e., the magnetic anisotropy) of a magnetic ion is not predicted by a spin Hamiltonian because it does not include the orbital degree of freedom explicitly. In contrast, the magnetic anisotropy is readily predicted by electronic structure theories employing both orbital and spin degrees of freedom, if one takes into consideration the spin–orbit coupling (SOC), , of a magnetic ion where and are, respectively, the spin and orbital operators and λ theSOCconstant. It was shown that the preferred spin orientation of a magnetic ion can be predicted and understood in terms of theHOMO–LUMOinteractions of the magnetic ion by takingSOC, , as perturbation. A spin Hamiltonian gives rise to the spin‐half misconception, namely, the blind belief that spin‐half magnetic ions do not possess magnetic anisotropy that arise fromSOC. This misconception contradicts not only experimental observations on spin‐half ions but also theoretical results based onDFTcalculations and perturbation theory analyses based on an electronic Hamiltonian. This misconception is a direct consequence from the limitedness of a spin Hamiltonian that it lacks the orbital degree of freedom. We show that the magnetic properties of 5dion oxides are better explained by theLS‐coupling than by thejj‐coupling scheme ofSOC, and the spin‐orbital entanglement of 5dions is not as strong as has been assumed.

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Magnetic order in the frustrated Ising-like chain compoundSr3NiIrO6

Cited by 30 publications

References 28 publications

Magnetic properties ofSr3NiIrO6andSr3CoIrO6: Magnetic hysteresis with coercive fields of up to 55 T

Magnetic properties ofSr3NiIrO6andSr3CoIrO6: Magnetic hysteresis with coercive fields of up to 55 T

Magnetostriction-driven ground-state stabilization in 2H perovskites

Magnetic Properties from the Perspectives of Electronic Hamiltonian

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