Ferromagnetic resonance in iron whiskers

1970 ◽  
Vol 48 (9) ◽  
pp. 1103-1104 ◽  
Author(s):  
V. Kambersky
Keyword(s):  
Line Width ◽  
Ferromagnetic Resonance ◽  
Pure Iron ◽  
Room Temperature ◽  
Electron Spins ◽  
Unsuccessful Attempt ◽  
Splitting Factor ◽  
Iron Whiskers ◽  
Line Widths

Results are reported for the line width of the ferromagnetic resonance in pure iron whiskers. Line widths were measured at 24.5, 35, and 73 GHz and at room temperature and 4.2 °K. An unsuccessful attempt was made to detect the antiresonance at ω = γB, where γ is the spectroscopic splitting factor of the electron spins in iron.

The magnetoelastic coefficients h 3 and h 4 of (100) nickel films

1972 ◽  
Vol 328 (1572) ◽  
pp. 49-65 ◽  
Keyword(s):  
Single Crystal ◽  
Saturation Magnetization ◽  
Ferromagnetic Resonance ◽  
Room Temperature ◽  
Magnetocrystalline Anisotropy ◽  
Anisotropy Constant ◽  
Published Data ◽  
Nickel Films ◽  
Splitting Factor ◽  
Cubic Anisotropy

New values have been obtained for the magnetoelastic coefficients h 3 and h 4 of nickel at room temperature from ferromagnetic resonance experiments on (100) single crystal nickel films. The ratios of h 3 / h 1 and h 4 / h 1 are found to be 0.091 ± 0.007 and 0.153 ± 0.015 respectively which give h 3 = (- 8.5 ± 0.7) x 10 -6 and h 4 = (- 14.3 ± 1.4) x 10 -6 if the Lee & Asgar value of h 3 is used (- 94 x 10 -6 ). The magnetocrystalline anisotropy constant K 1 , the saturation magnetization M and the spectroscopic splitting factor g have been measured also. It is found that K 1 = ( - 5.4 ± 0.3) x 10 4 erg/cm 3 and that g = 2.161 ± 0.009 in agreement with published data on bulk samples but that the value of M is found to be higher than the bulk value by 1.6%. The discrepancies between the values of h 3 , h 4 and M as reported here and the bulk values are discussed. The theory of feromagnetic resonance has been extended to cover the five-constant representation of magnetostriction and to the K 3 anisotropy term. The effect of the g factor having cubic anisotropy on the resonance conditions has been calculated.

scholarly journals Температурная зависимость напряжения, вызванного спиновым током в гетероструктуре манганит/иридат

2021 ◽  
Vol 63 (9) ◽  
pp. 1321
Author(s):  
Т.А. Шайхулов ◽  
К.Л. Станкевич ◽  
К.И. Константинян ◽  
В.В. Демидов ◽  
Г.А. Овсянников
Keyword(s):  
Thin Film ◽  
Single Crystal ◽  
Temperature Dependence ◽  
Hall Effect ◽  
Ferromagnetic Resonance ◽  
Room Temperature ◽  
Ferromagnetic Layer ◽  
Spin Current ◽  
Epitaxial Thin Film ◽  
Inverse Spin Hall Effect

The temperature dependence of the voltage induced by the spin current was studied in an epitaxial thin-film La0.7Sr0.3MnO3 / SrIrO3 heterostructure deposited on a single-crystal NdGaO3 substrate. The spin current was generated by microwave pumping under conditions of ferromagnetic resonance in the La0.7Sr0.3MnO3 ferromagnetic layer and was detected in the SrIrO3 layer due to inverse spin Hall effect. A significant increase of half-width of the spin current spectrum along with the rise of amplitude of the spin current upon cooling from room temperature (300 K) to 135 K were observed.

scholarly journals Influence of hydrogenation on magnetoresonance characteristics of nanocomposite (CoFeB)mC100-m films

2018 ◽  
Vol 185 ◽  
pp. 04003
Author(s):  
Sergei Vyzulin ◽  
Alexandr Kevraletin ◽  
Nikolaj Syr’ev
Keyword(s):  
Absorption Line ◽  
Line Width ◽  
Ferromagnetic Resonance ◽  
Anisotropy Field ◽  
Film Plane ◽  
Nanocomposite Films ◽  
Working Chamber ◽  
Resonant Field

The influence of hydrogenation on the magnetoresonance characteristics of nanocomposite films during synthesis is studied by the method of ferromagnetic resonance (FMR). It is shown that introduction of hydrogen into the working chamber during the synthesis of film nanogranular structures (CoFeB)mC100-m leads to a change in a resonant field, to increase of the absorption line width, to reduction of anisotropy field in the film plane.

scholarly journals Temporal and Spatial Fluctuations in Widths of solar Euv Lines

1980 ◽  
Vol 51 ◽  
pp. 53-53
Author(s):  
R.G. Athay ◽  
O.R. White
Keyword(s):  
Line Width ◽  
Sound Speed ◽  
Large Scale ◽  
Small Cells ◽  
The Sun ◽  
Doppler Shifts ◽  
Spatial Fluctuations ◽  
Local Sound ◽  
Line Widths ◽  
Temporal And Spatial

AbstractAnalyses of some 300 hours of time sequences of solar EUV line profiles obtained with 0S0-8 show large fluctuations in line widths. At a given location on the sun, line widths fluctuate temporally on time scales ranging from less than a minute to over an hour. At any given time, line widths fluctuate spatially on a variety of scales ranging from active region size to arc second size. Temporal and spatial fluctuations are of approximately the same amplitude. Thus, the sun can be characterized by an aggregate of small cells in each of which line widths are fluctuating in time and which have random phases with respect to each other.Spatial fluctuations in line width are correlated with large scale spatial fluctuations in brightness for some lines but not for others. Temporal fluctuations in width are sometimes correlated with either Doppler shifts or intensity fluctuations, but more often such correlations are absent.For a given line, the line width varies through an extreme range of about a factor of two. Nonthermal components of line width vary from approximately the local sound speed to a small fraction of the sound speed.

scholarly journals Molecular Line Studies of Dense Core Motions

1992 ◽  
Vol 150 ◽  
pp. 217-222
Author(s):  
Yuefang Wu
Keyword(s):  
Line Width ◽  
Dense Core ◽  
Emission Region ◽  
Molecular Line ◽  
Dense Cores ◽  
Chemical Effects ◽  
Size Relationship ◽  
Molecular Lines ◽  
Line Widths

Molecular lines have revealed various supporting motions in dense cores. Line widths and emission region sizes of NH3 and CS in the same kind of cores or of the same line in cores with or without sources are different and can not be explained with the line width- size relationship. Outflows in dense cores show rich characteristics which can account for the NH3 emission difference between the two kinds of the cores; CS emission is consistent with the chemical effects in shocked regions. Rotation exists in both kinds of cores and may be related to the observed polarities and collimations of outflows.

Theory of Ferromagnetic Resonance in Rare Earth Garnets. II. Line Widths

1959 ◽  
Vol 116 (2) ◽  
pp. 323-330 ◽  
Author(s):  
P. -G. De Gennes ◽  
C. Kittel ◽  
A. M. Portis
Keyword(s):  
Rare Earth ◽  
Ferromagnetic Resonance ◽  
Line Widths
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