The electrodynamics of magneto-electric media

O'Dell, Thomas

doi:10.1080/14786436208213701

Cited by 192 publications

(289 citation statements)

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“…13, it was proposed that the ME H effect, that is, the induction of P [1][2][3][4][5][6][7][8][9][10] by applying H [110] , observed in NMTO originates from the presence of net toroidal moment t along [001] through the relation Pp À t Â H. If this scenario is correct, we can also expect the ME E effect, the induction of M along [110] (M [110] ) induced by applying E [1][2][3][4][5][6][7][8][9][10] , with the relation Mpt Â E from phenomenological consideration 7 . Thus, we examined the ME E effect in NMTO.…”

Section: Resultsmentioning

confidence: 99%

“…All the data shown in Fig. 1a were taken after ME field cooling with E [1][2][3][4][5][6][7][8][9][10] ¼ 1 MV m À 1 and selected H [110] . Below 9 K, magnetoelectrically induced P [1][2][3][4][5][6][7][8][9][10] develops in all the data.…”

Section: Resultsmentioning

confidence: 99%

“…This configuration allows measurement of the ME tensor components a 12 (or a 21 ). Before the respective measurements, the specimen was cooled from 20 K (4T SG1 ) to 2 K in finite |E Â H| with selected E along [1][2][3][4][5][6][7][8][9][10] (E [1][2][3][4][5][6][7][8][9][10] ) and H [110] (ME field cooling). Then, P [1][2][3][4][5][6][7][8][9][10] was taken at m 0 H [110] ¼ 9 T in the absence of E [1][2][3][4][5][6][7][8][9][10] .…”

Section: Resultsmentioning

confidence: 99%

“…1a were taken after ME field cooling with E [1][2][3][4][5][6][7][8][9][10] ¼ 1 MV m À 1 and selected H [110] . Below 9 K, magnetoelectrically induced P [1][2][3][4][5][6][7][8][9][10] develops in all the data. It is noteworthy that the magnitude of P [1][2][3][4][5][6][7][8][9][10] strongly depends on the strength of cooling H [110] .…”

Section: Resultsmentioning

confidence: 99%

“…T he magnetoelectric (ME) effect, that is, the induction of either magnetization M by an electric field E (ME E effect) or electric polarization P by a magnetic field H (ME H effect), is a sensitive probe of the magnetic symmetry of magnetic insulators [1][2][3] . The terms of the free energy F to be considered are F ¼ À MH À PE À aHE-bHHE-gHEEy.…”

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confidence: 99%

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Magnetoelectric control of frozen state in a toroidal glass

Yamaguchi

Kimura

2013

Nat Commun

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The glass state of matter represents a frozen state of an atomically disordered system with local order only. Instead of atoms, systems with glassy states of magnetic and electric dipole moments in solids are known as spin and dipole glasses, respectively. In these conventional glasses, slow dynamics, such as relaxation and memory phenomena, are characteristics of their magnetic/dielectric properties. Here we propose a new glassy state in solids, a 'toroidal glass', in which toroidal moments-vector-like electromagnetic multipole moments breaking both space inversion and time reversal symmetries, and producing a linear magnetoelectric coupling-are randomly oriented and frozen. We investigate the dynamics of a linear magnetoelectric effect in Ni 0.4 Mn 0.6 TiO 3 and find that the magnetoelectric responses strongly depend on the magnetoelectric cooling history and show striking memory effects. These unusual magnetoelectric dynamical features can be explained in the framework of a toroidal glass in which the toroidal frozen state can be controlled magnetoelectrically.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

mentioning

confidence: 99%

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Magnetoelectric control of frozen state in a toroidal glass

Yamaguchi

Kimura

2013

Nat Commun

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Magneto‐optical Materials

Kleemann¹

2007

Handbook of Magnetism and Advanced Magnetic Materials

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After introducing the concepts of linear and nonlinear magneto‐optics in the visible spectral range, the flourishing field of X‐ray circular and linear dichroism is briefly discussed with pertinent examples. The experimental part starts with the basic idea of magneto‐optic ellipsometry and then focuses on the development of new experimental techniques like vector magneto‐optical Kerr effect (MOKE), diffracted MOKE, dynamic MOKE, nonlinear MOKE, and magneto‐optic X‐ray microscopy. Specified and timely material aspects are finally discussed under the topics magneto‐optical storage materials, magnetic semiconductors, antiferromagnets, and magnetophotonic crystals. It is stressed that the magneto‐optical probe is indispensable in the limits of very short times ( femtomagnetism ), that it plays a leading role in the development of spintronics , and that nano‐ and microstructured magnetic materials have opened the new field of magnetophotonics .

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