Determination of intrinsic FMR line broadening in ferromagnetic (Fe44Co56)77Hf12N11 nanocomposite films

Seemann, K.; Leiste, H.; Klever, Ch.

doi:10.1016/j.jmmm.2010.05.062

Cited by 16 publications

(3 citation statements)

References 20 publications

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“…FMR is also an informative technique to investigate the internal spin dynamics responsible for the relaxation processes in ferromagnetic nanoparticle systems. [8][9][10][11][12][13][14][15] Here, we describe the FMR studies of MgO:Ni to gain a physical insight into magnetic interactions and local anisotropy field phenomena.…”

Section: Introductionmentioning

confidence: 99%

Multi-frequency ferromagnetic resonance investigation of nickel nanocubes encapsulated in diamagnetic magnesium oxide matrix

Nellutla

Shibata

Singamaneni

et al. 2016

Journal of Applied Physics

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Partially aligned nickel nanocubes were grown epitaxially in a diamagnetic magnesium oxide (MgO:Ni) host and studied by a continuous wave ferromagnetic resonance (FMR) spectroscopy at the X-band (9.5 GHz) from ca. 117 to 458 K and then at room temperature for multiple external magnetic fields/resonant frequencies from 9.5 to 330 GHz. In contrast to conventional magnetic susceptibility studies that provided data on the bulk magnetization, the FMR spectra revealed the presence of three different types of magnetic Ni nanocubes in the sample. Specifically, three different ferromagnetic resonances were observed in the X-band spectra: a line 1 assigned to large nickel nanocubes, a line 2 corresponding to the nanocubes exhibiting saturated magnetization even at ca. 0.3 T field, and a high field line 3 (g eff $ 6.2) tentatively assigned to small nickel nanocubes likely having their hard magnetization axis aligned along or close to the direction of the external magnetic field. Based on the analysis of FMR data, the latter nanocubes possess an anisotropic

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Section: Introductionmentioning

confidence: 99%

Multi-frequency ferromagnetic resonance investigation of nickel nanocubes encapsulated in diamagnetic magnesium oxide matrix

Nellutla

Shibata

Singamaneni

et al. 2016

Journal of Applied Physics

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“…Magneto-optic (Paz, 2012), dipolar energy contributions (Bose, 2012), nanocrystalline (Maklakov, 2012;Raita, 2012), La0.7Sr0.3MnO3 films (Golosovsky, 2012), La0.67Ba0.33Mn1-yA y O3, A -Fe, Cr , voltage-controlled magnetic anisotropy (VCMA) and spin transfer torque (Zhu, 2012) and the typical properties of the inertial resonance are investigated (Olive, 2012). The exchange bias (Backes, 2012), Q cavities for magnetic material (Beguhn, 2012), MgO/CoFeB/Ta structure , the interfacial origin of the giant magnetoresistive effect (GMR) phenomenon (Prieto, 2012), selfdemagnetization field (Hinata, 2012), Fe3O4/InAs(100) hybrid spintronic structures (Huang, 2012), granular films (Kakazei, 1999(Kakazei, , 2001Sarmiento, 2007;Krone, 2011;Kobayashi, 2012), nano-sized powdered barium (BaFe12O19) and strontium (Sr Fe12O19) hexaferrites (Korolev, 2012), Ni0.7Mn0.3-x CoxFe2O4 ferrites (NiMnCo: x = 0.00, 0.04, 0.06, and 0.10) (Lee, 2012), thin films (Demokritov, 1996(Demokritov, ,1997Nakai, 2002;Lindner, 2004;Aswal, 2005;Jalali-Roudsar, 2005;Cochran, 2006;Mizukami, 2007;Seemann, 2010), Ni2MnGa films (Huang, 2004), magnetic/electronic order of films (Shames, 2012), Fe1-xGd(Tb)x films , in ε-Al0.06Fe1.94O3 (Yoshikiyo, 2012). 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).…”

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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“…9(c) shows the FMR linewidth (Δ H ) as a function of applied operating frequency ( f ) for all the magnetic oxide samples. The observed data were fitted to a line by considering the Landau–Lifshitz–Gilbert (LLG) model represented by eqn (6) ; 101,102 where α is the Gilbert damping constant known as the intrinsic damping parameter. Δ H 0 is the frequency independent ( f = 0) contribution to Δ H produced by inhomogeneous broadening also called as extrinsic contribution to linewidth.…”

Section: Resultsmentioning

confidence: 99%

Role of Ce concentration on the structural and magnetic properties of functional magnetic oxide particles

2021

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Determination of intrinsic FMR line broadening in ferromagnetic (Fe44Co56)77Hf12N11 nanocomposite films

Cited by 16 publications

References 20 publications

Multi-frequency ferromagnetic resonance investigation of nickel nanocubes encapsulated in diamagnetic magnesium oxide matrix

Multi-frequency ferromagnetic resonance investigation of nickel nanocubes encapsulated in diamagnetic magnesium oxide matrix

Ferromagnetic Resonance

Role of Ce concentration on the structural and magnetic properties of functional magnetic oxide particles

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