Effect of strain-induced anisotropy on magnetization dynamics in Y3Fe5O12 films recrystallized on a lattice-mismatched substrate

Krysztofik, Adam; Ozoglu, Sevgi; McMichael, Robert D.; Coy, Emerson

doi:10.1038/s41598-021-93308-3

Cited by 27 publications

(25 citation statements)

References 47 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…As discussed in the previous section, the variations in c and a with the film thickness in both kinds of NFO films could possibly be due to the difference in their thermal expansion coefficients for the film and the substrate since the LPE synthesis of the film involved high growth and annealing temperatures. Such a finding was previously reported in the case of PLD YIG films on YAG substrates 35 , 37 . Estimated H σ values (Tables 2 and 4 ) are larger for films on (100) MGO than for films on (110) MGO and showed an increase with increase in the thickness of NFO.…”

Section: Discussionsupporting

confidence: 85%

“…As in the present study, a similar increase in the in-plane tensile strain with increasing film thickness was attributed to the difference in the linear thermal expansion coefficient for the film and the substrate. For YIG = 10 × 10 –6 /C which is a factor 4 greater than that of YAG, = 2.7 × 10 –6 /C 35 , 36 . In another study, the in-plane tensile strain in a 4 m thick YIG film on 1 mm thick YAG substrate grown by CVD techniques at 1250 C was also accounted for by the mismatch in 37 .…”

Section: Resultsmentioning

confidence: 95%

“…We estimated the strain induced magnetic anisotropy field H σ from the lattice constants in Table 2 determined from the XRD data. The anisotropy field is given by 35 , 36 where λ is the magnetostriction, σ is the stress in the film and M s is the saturation magnetization. The stress is given by 27 , where E is the Young’s modulus.…”

Section: Resultsmentioning

confidence: 99%

See 2 more Smart Citations

Strain induced anisotropy in liquid phase epitaxy grown nickel ferrite on magnesium gallate substrates

Liu

Zhou

Regmi

et al. 2022

Sci Rep

View full text Add to dashboard Cite

This work focuses on the nature of magnetic anisotropy in 2.5–16 micron thick films of nickel ferrite (NFO) grown by liquid phase epitaxy (LPE). The technique, ideal for rapid growth of epitaxial oxide films, was utilized for films on (100) and (110) substrates of magnesium gallate (MGO). The motivation was to investigate the dependence of the growth induced anisotropy field on film thickness since submicron films of NFO were reported to show a very high anisotropy. The films grown at 850–875 C and subsequently annealed at 1000 C were found to be epitaxial, with the out-of-plane lattice constant showing unanticipated decrease with increasing film thickness and the estimated in-plane lattice constant increasing with the film thickness. The uniaxial anisotropy field Hσ, estimated from X-ray diffraction data, ranged from 2.8–7.7 kOe with the films on (100) MGO having a higher Hσ value than for the films on (110) MGO. Ferromagnetic resonance (FMR) measurements for in-plane and out-of-plane static magnetic field were utilized to determine both the magnetocrystalline the anisotropy field H4 and the uniaxial anisotropy field Ha. Values of H4 range from −0.24 to −0.86 kOe. The uniaxial anisotropy field Ha was an order of magnitude smaller than Hσ and it decreased with increasing film thickness for NFO films on (100) MGO, but Ha increased with film thickness for films on (110) MGO substrates. These observations indicate that the origin of the induced anisotropy could be attributed to several factors including (i) strain due to mismatch in the film-substrate lattice constants, (ii) possible variations in the bond lengths and bond angles in NFO during the growth process, and (iii) the strain arising from mismatch in the thermal expansion coefficients of the film and the substrate due to the high growth and annealing temperatures involved in the LPE technique. The LPE films of NFO on MGO substrates studied in this work are of interest for use in high frequency devices.

show abstract

Section: Discussionsupporting

confidence: 85%

Section: Resultsmentioning

confidence: 95%

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Strain induced anisotropy in liquid phase epitaxy grown nickel ferrite on magnesium gallate substrates

Liu

Zhou

Regmi

et al. 2022

Sci Rep

View full text Add to dashboard Cite

show abstract

“…This scenario has been described with the so-called anisotropy dispersion model by Krysztofik et al in Ref. [58]. However, in contrast to our results, they observed a convex shape for the ∆H(f ) dependence with a negative slope in ∆H(f ) such that we can also rule out a distribution in magnetic anisotropy as the origin of the non-linear ∆H(f ) dependence in the high temperature regime.…”

Section: B Possible Additional Damping Processescontrasting

confidence: 64%

Reduced effective magnetization and damping by slowly-relaxing impurities in strained $γ$-$\mathrm{Fe_2O_3}$ thin films

Müller¹,

Scheufele²,

Gückelhorn³

et al. 2022

Preprint

View full text Add to dashboard Cite

“…For example, in ultrathin pure and Zn-substituted nickel ferrite films on magnesium aluminate and some gallate substrates H a to the order 10 to 15 kOe were previously reported [26,27]. Thin films of YIG on yttrium aluminum garnet (YAG) has attracted considerable interest for achieving a large perpendicular magnetic anisotropy [28][29][30][31][32][33][34]. The lattice constants of YIG and YAG are 12.376 Å and 12.009 Å, respectively, and the −3% mismatch is expected to result in a compressive in-plane strain and a tensile strain perpendicular to the film plane [35].…”

Section: Introductionmentioning

confidence: 99%

Strain Control of Magnetic Anisotropy in Yttrium Iron Garnet Films in a Composite Structure with Yttrium Aluminum Garnet Substrate

et al. 2022

View full text Add to dashboard Cite

This report is on the nature of strain in thin films of yttrium iron garnet (YIG) on yttrium aluminum garnet (YAG) substrates due to film-substrate lattice mismatch and the resulting induced magnetic anisotropy. Films with thickness 55 nm to 380 nm were deposited on (100), (110), and (111) YAG substrates using pulsed laser deposition (PLD) techniques and characterized by structural and magnetic characterization techniques. The in-plane strain determined to be compressive using X-ray diffraction (XRD). It varied from −0.12% to −0.98% and increased in magnitude with increasing film thickness and was relatively large in films on (100) YAG. The out-of-plane strain was tensile and also increased with increasing film thickness. The estimated strain-induced magnetic anisotropy field, found from XRD data, was out of plane; its value increased with film thickness and ranged from 0.47 kOe to 3.96 kOe. Ferromagnetic resonance (FMR) measurements at 5 to 21 GHz also revealed the presence of a perpendicular magnetic anisotropy that decreased with increasing film thickness and its values were smaller than values obtained from XRD data. The PLD YIG films on YAG substrates exhibiting a perpendicular anisotropy field have the potential for use in self-biased sensors and high-frequency devices.

show abstract

Effect of strain-induced anisotropy on magnetization dynamics in Y3Fe5O12 films recrystallized on a lattice-mismatched substrate

Cited by 27 publications

References 47 publications

Strain induced anisotropy in liquid phase epitaxy grown nickel ferrite on magnesium gallate substrates

Strain induced anisotropy in liquid phase epitaxy grown nickel ferrite on magnesium gallate substrates

Reduced effective magnetization and damping by slowly-relaxing impurities in strained $γ$-$\mathrm{Fe_2O_3}$ thin films

Strain Control of Magnetic Anisotropy in Yttrium Iron Garnet Films in a Composite Structure with Yttrium Aluminum Garnet Substrate

Contact Info

Product

Resources

About