Magneto-Optics and Spectroscopy of Antiferromagnets

Eremenko, V. V.; Litvinenko, Yu. G.; Kharchenko, N. K.; Naumenko, V. M.

doi:10.1007/978-1-4612-2846-2

Cited by 49 publications

(58 citation statements)

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“…Later the true species was determined as 4 Jm I 'Fm'1 10 · 111 . 27). the H,E;E~o term (tensor fom1 of piezomagnetic effect) does not seem to have been used so far to reverse antiferromagnetically ordered spins.…”

Section: Possibilities Of Reorjentatjon and Switchingmentioning

confidence: 99%

On the possibility of ferromagnetic, antiferromagnetic, ferroelectric, and ferroelastic domain reorientations in magnetic and electric fields

Schmid

1999

Ferroelectrics

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Section: Possibilities Of Reorjentatjon and Switchingmentioning

confidence: 99%

On the possibility of ferromagnetic, antiferromagnetic, ferroelectric, and ferroelastic domain reorientations in magnetic and electric fields

Schmid

1999

Ferroelectrics

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“…It was found in [25] for cobalt (CoF 2 , CoWO 4 ) and manganese (MnCO 3 , MnF 2 , RbMnF 3 , KMnF 3 ) containing compounds that the maximum frequency in the spin-wave spectrum, estimated from the AFMR follows a linear dependence on the Néel temperature. Applying the same procedure to nickel compounds (NiF 2 , KNiF 3 , NiO), one can estimate a value for NiWO 4 close to 108 cm −1 , and thus the value of the doubled exchange energy ~216 cm −1 , which is nearly two times larger than proposed from AFMR measurements in [24].…”

Section: Introductionmentioning

confidence: 99%

Synchrotron-based far-infrared spectroscopy of nickel tungstate

Kalinko

Kuzmin

Roy

et al. 2016

Low Temperature Physics

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“…As symmetries play an important role in magneto-optic effects [11], we begin our discussion with a general symmetry analysis. Magneto-optic effects are closely related to the AC Hall effect [see Eq.…”

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Gate-Controllable Magneto-optic Kerr Effect in Layered Collinear Antiferromagnets

2016

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Using symmetry arguments and a tight-binding model, we show that for layered collinear antiferromagnets, magneto-optic effects can be generated and manipulated by controlling crystal symmetries through a gate voltage. This provides a promising route for electric field manipulation of the magneto-optic effects without modifying the underlying magnetic structure. We further demonstrate the gate control of magneto-optic Kerr effect (MOKE) in bilayer MnPSe3 using first-principles calculations. The field-induced inversion symmetry breaking effect leads to gate-controllable MOKE whose direction of rotation can be switched by the reversal of the gate voltage.PACS numbers: 75.50. Ee,75.70.Ak,78.20.Ls,85.70.Sq Magneto-optic effects are one of the defining features of time-reversal (T ) symmetry breaking in matter. Usually, the T symmetry is broken either by an external magnetic field, or by the spontaneous appearance of a macroscopic magnetization such as in ferromagnets. Similar to their ferromagnetic counterparts, the T symmetry is also broken in antiferromagnets. However, because of their vanishing net magnetization one would naively expect an absence of magneto-optic effects in antiferromagnets. This assumption has been recently challenged by the theoretical demonstration of a rather large magneto-optic Kerr effect (MOKE) in certain non-collinear antiferromagnets with zero net magnetization [1]. This effect is closely related to the anomalous Hall effect predicted in the same class of materials [2,3], both of which are dictated by the absence of certain crystal symmetries. The appearance of magneto-optic effects in antiferromagnets is of intrinsic interest, since it would allow direct detection of the magnetic order and therefore could be useful for antiferromagnets-based memory devices [4].While non-collinear antiferromagnets have been the focus of recent interest [1][2][3], in this Letter we show that magneto-optic effects can also exist in the more commonly available collinear antiferromagnets. We start by analyzing the general symmetry requirements for magneto-optic effects, and demonstrate the symmetry principles by constructing a tight-binding model with a collinear Néel type order. We show that, contrary to the general belief, lifting the spin degeneracy of the energy bands is not a sufficient condition to generate magnetooptic effects; it is the crystal symmetry that actually controls these effects.Based on this understanding, we predict that a perpendicular electric field can be used to generate and control the MOKE in layered antiferromagnets using firstprinciples calculations. Recent theoretical and experimental progress has identified several layered compounds as promising candidates to host magnetism in their thinfilm limit [5][6][7][8][9][10]. One of them is MnPSe 3 , a semiconductor with collinear antiferromagnetic order within each layer. We show that the field-induced inversion (I) symmetry breaking in bilayer MnPSe 3 gives rise to a MOKE whose direction of rotation can be switched by the reversal...

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Magneto-Optics and Spectroscopy of Antiferromagnets

Cited by 49 publications

References 0 publications

On the possibility of ferromagnetic, antiferromagnetic, ferroelectric, and ferroelastic domain reorientations in magnetic and electric fields

On the possibility of ferromagnetic, antiferromagnetic, ferroelectric, and ferroelastic domain reorientations in magnetic and electric fields

Synchrotron-based far-infrared spectroscopy of nickel tungstate

Gate-Controllable Magneto-optic Kerr Effect in Layered Collinear Antiferromagnets

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