MagnetostaticsMagnetostatics

Lacheisserie, E. du Tremolet de; Gignoux, D.; Schlenker, M.

doi:10.1007/978-0-387-23062-7_2

Cited by 46 publications

(72 citation statements)

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“…The real part of the reversible inverse magnetostriction and calculated fractional length change for a Ni sample are shown in figure 2. In full agreement with available data [29,30] λ + demonstrates no change of the sign of magnetostriction, which is opposite to the sign obtained for Fe in low fields, the absolute values of the magnetostriction being nearly an order of magnitude higher with respect to Fe.…”

Section: ([Shulphqwdo Uhvxowvsupporting

confidence: 89%

“…The data thus derived demonstrate a maximum at around 13 kA/m and a change of the sign at around 16 kA/m. Such behaviour of the fractional length change with applied field is a " signature" of polycrystalline iron, related to the interplay of contributions of positive 100 λ and negative 111 λ magnetostriction constants and corresponds well with the results of classical works [29,30]. The real part of the reversible inverse magnetostriction and calculated fractional length change for a Ni sample are shown in figure 2.…”

Section: ([Shulphqwdo Uhvxowvsupporting

confidence: 86%

“…The absolute values of magnetostriction calculated from the reversible inverse magnetostriction are substantially lower than the well established data on static fractional change of the length [29,30]. This discrepancy, as discussed in the Introduction section, should be attributed to the existence of the magnetic hysteresis in both materials and using rather high frequencies of around 100 kHz.…”

Section: ([Shulphqwdo Uhvxowvmentioning

confidence: 79%

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Peculiarities of magnetoelastic coupling in Ni–Fe–Ga–Co ferromagnetic martensite

Kustov¹,

Corró²,

Cesari³

et al. 2010

J. Phys. D: Appl. Phys.

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The reversible stress-induced magnetization (inverse magnetostriction or Villari effect) has been measured in a polycrystalline Ni–Fe–Ga–Co ferromagnetic martensite. The samples were mechanically excited using longitudinal resonant oscillations at frequencies close to 100 kHz, and experiments were performed over the temperature range 170–350 K under variable polarizing fields. It has been found that the reversible inverse magnetostriction changes its sign under low polarizing fields over a certain temperature range with its upper limit close to the Curie temperature. We argue that the variations of sign of the reversible inverse magnetostriction effect are related in the present experiments with the change in the sign of magnetostriction, as has additionally been verified in test measurements performed for pure Ni and Fe. The observed peculiarity of magnetoelastic coupling is also reflected in the temperature dependence of electrical resistance and even produces a minor effect in calorimetry scans. Possible origins of these features of magnetoelastic coupling are discussed.

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Section: ([Shulphqwdo Uhvxowvsupporting

confidence: 89%

Section: ([Shulphqwdo Uhvxowvsupporting

confidence: 86%

Section: ([Shulphqwdo Uhvxowvmentioning

confidence: 79%

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Peculiarities of magnetoelastic coupling in Ni–Fe–Ga–Co ferromagnetic martensite

Kustov¹,

Corró²,

Cesari³

et al. 2010

J. Phys. D: Appl. Phys.

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“…10. Such an anomalous behaviour of coercivity may arise due to an anti-symmetric exchange interaction which involves the LS Co(III) interacting with the excited HS Co(III) subsequently influencing the magneto-crystalline anisotropy and thereby reducing the coercive field [42]. To substantiate this, we derived the irreversible magnetisation from the FC and ZFC curves at 100 Oe.…”

Section: Magnetisationmentioning

confidence: 99%

Influence of Al doping in LaCoO3 on structural, electrical and magnetic properties

et al. 2014

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We report investigations on polycrystalline LaCo 1-x Al x O 3 (x = 0-0.9) bulk samples. The solid state synthesized samples showed a coexistence of rhombohedral and monoclinic phases in the intermediate concentrations (0.2 B x B 0.5) and pure rhombohedral phase otherwise. The observed effect of Al doping on dc transport has been analysed on the basis of small polaron hopping mechanism. The magnetisation results presented give evidence of weak ferromagnetism and anomalous temperature dependence of coercivity which we associate to the canting of the localised high-spin Co(III) and anti-symmetric exchange interactions at low temperatures.

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“…Meanwhile, one-way waveguiding 13 and one-way extraordinary optical transmission 14 were proposed by integrating magnetic materials with a photonic crystal and spoof surface plasmons, respectively. Among the various magneto-optical effects, Faraday rotation is of special interest, as it is the key technology in optical isolation 15,16 . Previously, plasmonic heterostructures 17 and planar photonic crystals 18 were proposed theoretically to enhance the nonreciprocal Faraday effect, but have not yet been realized.…”

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confidence: 99%

Nonreciprocal plasmonics enables giant enhancement of thin-film Faraday rotation

et al. 2013

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Light propagation is usually reciprocal. However, a static magnetic field along the propagation direction can break the time-reversal symmetry in the presence of magneto-optical materials. The Faraday effect in magneto-optical materials rotates the polarization plane of light, and when light travels backward the polarization is further rotated. This is applied in optical isolators, which are of crucial importance in optical systems. Faraday isolators are typically bulky due to the weak Faraday effect of available magneto-optical materials. The growing research endeavour in integrated optics demands thin-film Faraday rotators and enhancement of the Faraday effect. Here, we report significant enhancement of Faraday rotation by hybridizing plasmonics with magneto-optics. By fabricating plasmonic nanostructures on laser-deposited magneto-optical thin films, Faraday rotation is enhanced by one order of magnitude in our experiment, while high transparency is maintained. We elucidate the enhanced Faraday effect by the interplay between plasmons and different photonic waveguide modes in our system.

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MagnetostaticsMagnetostatics

Cited by 46 publications

References 0 publications

Peculiarities of magnetoelastic coupling in Ni–Fe–Ga–Co ferromagnetic martensite

Peculiarities of magnetoelastic coupling in Ni–Fe–Ga–Co ferromagnetic martensite

Influence of Al doping in LaCoO3 on structural, electrical and magnetic properties

Nonreciprocal plasmonics enables giant enhancement of thin-film Faraday rotation

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