Antiferromagnetic Resonance in Mn<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">F</mml:mi></mml:mrow><mml:mrow><mml:mn>2</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:math>

Johnson, Fred M.; Nethercot, Arthur H.

doi:10.1103/physrev.114.705

Cited by 203 publications

(45 citation statements)

References 36 publications

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“…An early zero-field AFMR study on singlecrystal slabs of MnF 2 has measured residual low-temperature (T ≈ 25 K) normalized linewidth ∆ω/ω res ≈ 6 × 10 −3 with resonance frequency ω res /2π ≈ 250 GHz. 27 This translates into a Gilbert damping parameter α ∼ (∆ω/ω res ) √ H a /H e ∼ 7 × 10 −4 , where the anisotropy and exchange fields for MnF 2 are given by H a ∼ 8 kOe and H e ∼ 500 kOe, respectively. 27,28 From a later high-field AFMR experiment using flat disk samples, 28 where the resonance frequencies are driven down into the mm-wave region, an improved normalized linewidth ∆ω/ω res ≈ 6 × 10 −4 was reported with ω res /2π ≈ 23 GHz at T ≈ 4 K, translating into α ∼ 8 × 10 −5 .…”

Section: Summary and Discussionmentioning

confidence: 99%

Superfluid spin transport through antiferromagnetic insulators

et al. 2014

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A theoretical proposal for realizing and detecting spin supercurrent in an isotropic antiferromagnetic insulator is reported. Superfluid spin transport is achieved by inserting the antiferromagnet between two metallic reservoirs and establishing a spin accumulation in one reservoir such that a spin bias is applied across the magnet. We consider a class of bipartite antiferromagnets with Néel ground states, and temperatures well below the ordering temperature, where spin transport is mediated essentially by the condensate. Landau-Lifshitz and magnetocircuit theories are used to directly relate spin current in different parts of the heterostructure to the spin-mixing conductances characterizing the antiferromagnet|metal interfaces and the antiferromagnet bulk damping parameters, quantities all obtainable from experiments. We study the efficiency of spin angular-momentum transfer at an antiferromagnet|metal interface by developing a microscopic scattering theory for the interface and extracting the spin-mixing conductance for a simple model. Within the model, a quantitative comparison between the spin-mixing conductances obtained for the antiferromagnet|metal and ferromagnet|metal interfaces is made.

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Section: Summary and Discussionmentioning

confidence: 99%

Superfluid spin transport through antiferromagnetic insulators

et al. 2014

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“…In MnF 2 , the spin wave spectrum has a gap of 1.081 meV measured through neutron scattering [14,39] and antiferromagnetic resonance experiments [40]. It is known that the two degenerate bands from the individual Mn sublattices split in a magnetic field applied along the easy axis [40].…”

Section: Prl 116 097204 (2016) P H Y S I C a L R E V I E W L E T T Ementioning

confidence: 99%

“…It is known that the two degenerate bands from the individual Mn sublattices split in a magnetic field applied along the easy axis [40]. The behavior of the k ¼ 0 spin wave mode under a magnetic field can be obtained from antiferromagnetic resonance experiments and provides a guide to the behavior of the rest of the spectrum since inelastic neutron scattering data at high magnetic fields are absent [41].…”

Section: Prl 116 097204 (2016) P H Y S I C a L R E V I E W L E T T Ementioning

confidence: 99%

Antiferromagnetic Spin Seebeck Effect

et al. 2016

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We report on the observation of the spin Seebeck effect in antiferromagnetic MnF2. A device scale on-chip heater is deposited on a bilayer of MnF2 (110) (30 nm)/Pt (4 nm) grown by molecular beam epitaxy on a MgF2 (110) substrate. Using Pt as a spin detector layer it is possible to measure thermally generated spin current from MnF2 through the inverse spin Hall effect. The low temperature (2 -80 K) and high magnetic field (up to 140 kOe) regime is explored. A clear spin flop transition corresponding to the sudden rotation of antiferromagnetic spins out of the easy axis is observed in the spin Seebeck signal when large magnetic fields (>9 T) are applied parallel the easy axis of the MnF2 thin film. When magnetic field is applied perpendicular to the easy axis, the spin flop transition is absent, as expected.

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“…19. а) Обусловленная антиферромагнитным резонансом линия поглощения MnFq при 4° К, наблюдавшаяся| в районе 1,2 мм Блуром (Колледж королевы Мэри), б) Температурная зависимость резонансной частоты MnF 2 , измеренная методами инфракрасной спектроскопии 18 и методом микроволновых гармоник 21 .…”

Section: циклотронный резонанс в очень сильных магнитных поляхunclassified

Спектроскопические Исследования В Далекой Инфракрасной Области

Martin¹

1964

Usp. Fiz. Nauk

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Antiferromagnetic Resonance in MnF2

Cited by 203 publications

References 36 publications

Superfluid spin transport through antiferromagnetic insulators

Superfluid spin transport through antiferromagnetic insulators

Antiferromagnetic Spin Seebeck Effect

Спектроскопические Исследования В Далекой Инфракрасной Области

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