Coercive Force of Single-Crystal GdIG as a Function of Temperature

Hanton, J. P.; Morrish, A. H.

doi:10.1063/1.1714074

Cited by 18 publications

(4 citation statements)

References 5 publications

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“…For all the films, H C increases drastically as T Comp is approached and exhibits a sharp peak at T Comp , which is . [29] Another interesting fact is that at a fixed temperature, H C for the GSGG/GdIG(31 nm) film is more than twice of that for the GGG/GdIG(31 nm) film (see Figure S5, Supporting Information), which is consistent with a recent report on the strain-induced enhancement of H C in REIGs. [30] Radio frequency (RF) transverse susceptibility (TS) measurements were employed to determine the temperature evolution of the effective magnetic anisotropy for both IP and OOP configurations.…”

Section: Magnetization and Effective Magnetic Anisotropysupporting

confidence: 90%

“…For all the films, H C increases drastically as T Comp is approached and exhibits a sharp peak at T Comp , which is expected as H C for a compensated ferrimagnet like GdIG varies as

\frac{1}{| T - T_{Comp} |}

. [ 29 ] Another interesting fact is that at a fixed temperature, H C for the GSGG/GdIG(31 nm) film is more than twice of that for the GGG/GdIG(31 nm) film (see Figure S5, Supporting Information), which is consistent with a recent report on the strain‐induced enhancement of H C in REIGs. [ 30 ]…”

Section: Resultsmentioning

confidence: 89%

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Scaling of the Thermally Induced Sign Inversion of Longitudinal Spin Seebeck Effect in a Compensated Ferrimagnet: Role of Magnetic Anisotropy

Chanda

Holzmann

Schulz

et al. 2021

Adv Funct Materials

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The authors report on a systematic investigation of the longitudinal spin Seebeck effect (LSSE) in a GGG(Gd3Ga5O12)/GdIG(Gd3Fe5O12)/Pt film series exhibiting an in‐plane magnetic easy axis with a compensation temperature (TComp) that decreases from 270 to 220 K when decreasing GdIG film thickness from 272 to 31 nm, respectively. For all the films, the LSSE signal flips its sign below TComp. The authors demonstrate a universal scaling behavior of the temperature dependence of LSSE signal for the GdIG films around their respective TComp. Additionally, the authors demonstrate LSSE in a 31 nm GdIG film grown on a lattice‐mismatched GSGG (Gd3Sc2Ga3O12) substrate that exhibits an out‐of‐plane magnetic easy axis at room temperature. However, this sample reveals a spin reorientation transition where the magnetic easy axis changes its orientation to in‐plane at low temperatures. A clear distinction is observed in the LSSE signal for the GSGG/GdIG(31 nm)/Pt heterostructure, relative to GGG/GdIG(31 nm)/Pt showing an in‐plane magnetic easy axis. The findings underscore a strong correlation between the LSSE signal and the orientation of magnetic easy axis in compensated ferrimagnets and opens the possibility to tune LSSE through effective anisotropy.

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Section: Magnetization and Effective Magnetic Anisotropysupporting

confidence: 90%

“…For all the films, H C increases drastically as T Comp is approached and exhibits a sharp peak at T Comp , which is expected as H C for a compensated ferrimagnet like GdIG varies as

\frac{1}{| T - T_{Comp} |}

Section: Resultsmentioning

confidence: 89%

Scaling of the Thermally Induced Sign Inversion of Longitudinal Spin Seebeck Effect in a Compensated Ferrimagnet: Role of Magnetic Anisotropy

Chanda

Holzmann

Schulz

et al. 2021

Adv Funct Materials

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“…The effect was explained by the diffusion of Gd 3+ and Ga 3+ ions into YIG films and hence may produce layers with compensation points. [31][32][33][34] In general, the post-deposition annealing treatment at 800 o C may cause moderate migration of Fe 3+ from the YIG film and Ga 3+ from the GGG substrate across the interface.…”

Section: Resultsmentioning

confidence: 99%

Effects of post-deposition annealing on the structure and magnetization of PLD grown yttrium iron garnet films

Kumar

Hossain

Budhani

2017

Journal of Applied Physics

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We report on the recrystallization of 200 nm thick as-grown Yttrium Iron Garnet ( Y 3.4 Fe 4.6 O 12 ) films on (111) face of Gadolinium Gallium Garnet (GGG) single crystals by post-deposition annealing. Epitaxial conversion of the as-grown microcrystalline YIG films was seen after annealing at 800 o C for more than 30 minutes both in ambient oxygen as well as in air. The as-grown oxygen annealed samples at 800 o C for 60 minutes crystallize epitaxially and show excellent figure-of-merit for saturation magnetization (MS = 3.3 μB/f.u., comparable to bulk value) and coercivity (HC ~ 1.1 Oe). The ambient air annealing at 800 o C with a very slow rate of cooling (2 o C/min) results in a double layer structure with a thicker unstrained epitaxial top layer having the MS and HC of 2.9 μB/f.u. and 0.12 Oe respectively. The symmetric and asymmetric Reciprocal space maps of both the samples reveal a locking of the in-plane lattice of the film to the in-plane lattice of substrate, indicating a pseudomorphic growth. The residual stress calculated by sin 2 ψ technique is compressive in nature. The lower layer in air annealed sample is highly strained, whereas, the top layer has negligible compressive stress.

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“…The problem remains a controversial subject. Whereas one study on Gd 3 Fe 5 O 12 showed that it exhibits a single peak in H c as a function of temperature [18], the others revealed a double peak in H c near T comp [19][20][21][22][23][24][25]. The key point is that previous researchers have not presented explicit magnetic behaviour (M-H) curves near T comp , which we will do in this paper.…”

Section: Introductionmentioning

confidence: 94%

A double peak of the coercive force near the compensation temperature in the rare earth iron garnets

Uemura

Yamagishi

Ebisu

et al. 2008

Philosophical Magazine

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The behaviour of the coercive force, H c , of ferrimagnets near the compensation temperature, T comp , for polycrystalline rare earth iron garnets R 3 Fe 5 O 12 (R ¼ Gd, Tb, Dy, Ho and Er) has been studied in detail. The present experimental results have verified the double peak in H c near T comp for these rare earth iron garnets R 3 Fe 5 O 12 . For Dy 3 Fe 5 O 12 , the experimental values are T comp ¼ 224 K, H c (max) ¼ 600 Oe at T comp AE K and % 10 K. The two peaks of H c arise at 214 and 232 K. The appearance of the double peak of H c is an intrinsic and characteristic property for R 3 Fe 5 O 12 . The results can be understood on the basis of a simple model. The hysteresis loop in the magnetization is caused by rotation of single domain under the influence of crystalline anisotropy rather than domain wall displacements of the multi-domain structure. The rare earth ion behaves as superimposed paraprocess under the influence of an internal field produced by iron sublattices and a weak exchange magnetic field.

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Coercive Force of Single-Crystal GdIG as a Function of Temperature

Cited by 18 publications

References 5 publications

Scaling of the Thermally Induced Sign Inversion of Longitudinal Spin Seebeck Effect in a Compensated Ferrimagnet: Role of Magnetic Anisotropy

Scaling of the Thermally Induced Sign Inversion of Longitudinal Spin Seebeck Effect in a Compensated Ferrimagnet: Role of Magnetic Anisotropy

Effects of post-deposition annealing on the structure and magnetization of PLD grown yttrium iron garnet films

A double peak of the coercive force near the compensation temperature in the rare earth iron garnets

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