Study of GMI-valve characteristics in the Co-based amorphous ribbon by ferromagnetic resonance

Park, D.G.; Kim, C.G.; Kim, W.W.; Hong, Jun Hwa

doi:10.1016/j.jmmm.2006.10.1134

Cited by 3 publications

(2 citation statements)

References 9 publications

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“…10 nm thick Fe/GaAs(110) film (Römer, 2012), triangular shaped permalloy rings (Ding, 2012) and Co2-Y hexagonal ferrite single rod (Bai, 2012) structures and properties have been studied by FMR tecniques (Spaldin, 2010). Biological applications (Berliner, 1981;Wallis, 2005;Gatteschi, 2006;Kopp, 2006;Fischer, 2008;Mastrogiacomo, 2010), giant magneto-impedance (Valenzuela, 2007;Park, 2007), dynamics of feromagnets (Vilasi, 2001;Rusek, 2004;Limmer, 2006;Sellmyer, 2006;Azzerboni, 2006;Krivoruchko, 2012), magneto-optic kerr effect (Suzuki, 1997;Neudecker, 2006), Heusler alloy (HA) films (Kudryavtsev, 2007), ferrites (Kohmoto, 2007), spin polarized electrons (Rahman, 2008) and quantum mechanics (Weil, 2007) have been studied by FMR technique in generally (Hillebrands, 2002(Hillebrands, , 2003(Hillebrands, , 2006. In additional, electric and magnetic properties of pure, Cu 2+ ions doped hydrogels have been studied by ESR techniques .…”

Section: Introductionmentioning

confidence: 99%

Ferromagnetic Resonance

Yaln¹

2013

Ferromagnetic Resonance - Theory and Applications

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The following information can be accessed with the help of such resonance experiments. (i) Electrical structure of point defects by looking at the absorption in a thin structure. (ii) The line width with the movement of spin or surroundings isn't changed. (iii) The distribution of the magnetic field in solid by looking at the of the resonance line position (chemical shift and etc.). (iv) Collective spin excitations. Ferromagnetic Resonance-Theory and Applications 2 The atoms of ferromagnetic coupling originate from the spins of d-electrons. The size of μ permanent atomic dipoles create spontaneously magnetized. According to the shape of dipoles materials can be ferromagnetic, antiferromagnetic, diamagnetic, paramagnetic and etc. Ferromagnetic resonance (FMR) technique was initially applied to ferromagnetic materials, all magnetic materials and unpaired electron systems. Basically, it is analogous to the electron paramagnetic resonance (EPR). The EPR technique gives better results at unpaired electron systems. The FMR technique depends on the geometry of the sample at hand. The demagnetization field is observed where the sample geometry is active. The resonance area of the sample depends on the properties of material. The FMR technique is advantageous because it does not cause damage to materials. Also, it allows a three dimensional analysis of samples. The FMR occurs at high field values while EPR occurs at low magnetic field values. Also, line-width of ferromagnetic materials is large according to paramagnetic materials. Exchange interaction energy between unpaired electron spins that contribute to the ferromagnetism causes the line narrowing. So, ferromagnetic resonance lines appear sharper than expected. The FMR studies have been increased since the EPR was discovered in

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Section: Introductionmentioning

confidence: 99%

Ferromagnetic Resonance

Yaln¹

2013

Ferromagnetic Resonance - Theory and Applications

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“…This is the case for materials with high spin-orbit coupling and positive spin hall angle, which promote a raise in the spin-to-charge current conversion. Remarkably, Platinum (Pt) seems to be the best solution for both protecting against oxidation [ 21 , 22 , 23 , 24 , 25 , 26 ] and promoting spin-to-charge conversion [ 27 , 28 , 29 ].…”

Section: Introductionmentioning

confidence: 99%

Longitudinal Spin Seebeck Effect Thermopiles Based on Flexible Co-Rich Amorphous Ribbons/Pt Thin-Film Heterostructures

Correa,

Svalov,

Ferreira

et al. 2023

Sensors

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Thermoelectric phenomena, such as the Anomalous Nernst and Longitudinal Spin Seebeck Effects, are promising for sensor applications in the area of renewable energy. In the case of flexible electronic materials, the request is even larger because they can be integrated into devices having complex shape surfaces. Here, we reveal that Pt promotes an enhancement of the thermoelectric response in Co-rich ribbon/Pt heterostructures due to the spin-to-charge conversion. Moreover, we demonstrated that the employment of the thermopiles configuration in this system increases the induced thermoelectric current, a fact related to the considerable decrease in the electric resistance of the system. By comparing present findings with the literature, we were able to design a flexible thermopile based on LSSE without the lithography process. Additionally, the thermoelectric voltage found in the studied flexible heterostructures is comparable to the ones verified for rigid systems.

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Ferromagnetic resonance imbalance at high microwave power: Effect on the Gilbert damping parameter

Dushenko

Ando

Shinjo

et al. 2019

Journal of Applied Physics

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Nowadays, electron spin resonance (ESR) systems are routinely used to measure the ferromagnetic resonance (FMR) in a wide range of experiments. However, the number of spins in ferromagnets far exceeds the small number of spins in paramagnetic systems that ESR systems were originally designed for. In this study, we show that high spin concentration and microwave input power—conditions routinely met in various FMR experiments—lead to the strong distortion of the FMR shape due to the sublinear operating regime of the microwave detector. We introduce the additional imbalance term in the FMR Lorentzian fitting function that allows extracting correct values of the Gilbert damping parameter under such conditions. Our results are crucial for the quantitative estimation of the Gilbert damping—the key parameter in many magnetic and spintronics measurements.

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Study of GMI-valve characteristics in the Co-based amorphous ribbon by ferromagnetic resonance

Cited by 3 publications

References 9 publications

Ferromagnetic Resonance

Ferromagnetic Resonance

Longitudinal Spin Seebeck Effect Thermopiles Based on Flexible Co-Rich Amorphous Ribbons/Pt Thin-Film Heterostructures

Ferromagnetic resonance imbalance at high microwave power: Effect on the Gilbert damping parameter

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