## 4 Analytical Discussion
### Papers with Various Subfields  
These bibliometric studies also explore the subject areas covered by the most cited papers. The classification of the highest-ranking articles for various subject subfields and years is presented in Table 3. The subject subfields of magnetization characterization with a citation range of 26-383 achieved the highest frequency percentage (91%) of citations. \begin{table}
\begin{tabular}{|c|c|c|c|c|c|} \hline Rank & **Ref** & **NC** & \
\begin{tabular}{c} **No. of** \\ **Authors** \\ \end{tabular} & **Method** &
\begin{tabular}{c} **Characterization of** \\ **Sample** \\ \end{tabular} & **Scope/Outcome/Advantages** & **Application** \\ \hline \(1\) & [13] & 383 & 5 & PLD & AHE, AFM & Proximity-induced YIG ferromagnetic in \\  & & & & & & \\  & & & & & & \\  & & & & & & \\  & & & & & & \\  & & & & & & \\
2 & [36] & 377 & 8 & - & FMR & \begin{tabular}{c} Exchange-coupled gallium-doped YIG \\ film is excellent for cavity \\ QED investigations. \\ \end{tabular} & Microwave \\ \hline \(3\) & [18] & 349 & 21 & MBE & SMR & \begin{tabular}{c} This allows SMR to measure spin \\ diffusion length and spin Hall angle in \\ NMs. SMR is a novel, simple \\ magnetoresistance effect that enables \\ new spin current investigations. \\ \end{tabular} & Spintronic \\ \hline \(4\) & [68] & 227 & 8 & - & \begin{tabular}{c} ISHE voltage \\ measurement \\ \end{tabular} & \begin{tabular}{c} Provides a different mechanism for the \\ LSSE that arises from the flow of \\ magnons through the thickness of the \\ ferromagnetic insulator (FMI) film. \\ \end{tabular} & Spintronic \\ \hline \(5\) & [8] & 202 & 9 & PLD & \begin{tabular}{c} PLD growth of low FMR linewidth YIG \\ nanofilms and their linewidth in FMR \\ characteristics. Linewidth correlates with \\ surface roughness and surface Fe \\ deficiency, indicating that surface \\ defect-associated two-magnon scattering \\ contributes significantly. \\ \end{tabular} & Spintronic \\ \hline \(6\) & [14] & 201 & 14 & PLD & FMR & \begin{tabular}{c} Damping phenomena may be caused by \\ ferromagnetic ordering in Pt atomic \\ layers near the YIG=Pt interface \\ \end{tabular} & Microwave \\ \hline \(7\) & [69] & 193 & 5 & - & SMR & \begin{tabular}{c} YIG’s magnon chemical potential is vital \\ for energy and spin transport in \\ magnetic insulators. \\ \end{tabular} & Spintronic \\ \hline \(8\) & [20] & 185 & 8 & LPE & SQUID & \begin{tabular}{c} Strong proximity effects in Pt on \\ magnetic insulators and their \\ contribution to spin-related studies. \\ \end{tabular} & Spintronic \\ \hline \(9\) & [15] & 179 & 16 & PLD & FMR, XRD, SQUID, & Identify spin waves using Pt’s inverse \\  & & & & & \\  & & & & & spin-Hall effect (ISHE) & \\ \hline \(10\) & [5] & 171 & 7 & \begin{tabular}{c} Sputteri \\ deep- \\ solution \\ \end{tabular} & \
\begin{tabular}{c} AFM, XRD, X-ray \\ reflectivity, AFM, \\ SQUID, FMR \\ \end{tabular} &
\begin{tabular}{c} Presented sputters nm-thick YIG films \\ with low damping. \\ \end{tabular} & Microwave \\ \hline \end{tabular}
\end{table} 
Table 2: The top ten most-cited papers in the field of YIG. Preparation/Fabrication of YIG is in the second position with a citation range of 26-383 and frequency weight of 56%, followed by magnon with a citation range of 26-227 and frequency weight of 54%. The subject categories in nanomaterials were ranked fourth with a citation range of 26-202 and frequency weight of 53%. Ferromagnetic/Ferrimagnetic resonance (FMR) (39%), magnetic anisotropy (39%), spintronic (32%), and spin-wave (31%), were among the remaining subjects, with a frequency weight of above 30%. Below is a summary of the categorized subjects observed in Table 3:
* Among all magnetic materials, yttrium iron garnet (YIG) has contributed the most significant role to understanding the dynamics of high-frequency magnetization. Bulk YIG crystal was the prototypical material for ferromagnetic resonance (FMR) experiments in the middle of the twentieth century due to its unique characteristics [15].