## 4 Analytical Discussion
### The Top 10 Most Cited Papers  
This analysis analyzed the top ten articles with the highest number of citations from 2012 to 2020 to identify the current strongest research projects in YIG development. Early papers typically have more citations than articles more recently published. Regardless of their overall quality, earlier articles are more frequently cited. Table 2 reveals that the top ten most cited papers are the most important YIG works to date, indicating the general interests and trends within the field. Table 2 summarizes the rank, author, citation, number of authors, methodology, sample characterization, scope/outcome/advantages, and application. According to Table 2, the citing of the top ten papers range from 171 to  
Figure 3: The top 100 most cited YIG papers during the last ten years.  
383 between 2012 and 2015. This study revealed that the paper contains various methods for producing high-quality YIG film for the intended application. The growth film was characterized by various measuring parameters to gather information for the application. The top 10 publications contribute a variety of aims, scope, outcomes, and advantages, all of which contribute to the research's advantages. The papers from [5; 8; 13; 14; 15; 18; 20; 36; 68; 69] published the top 10 papers, which had citation counts of 383, 377, 349, 227, 202, 201, 193, 185, 179, and 171, respectively.  
[PERSON] et al. [13] received 383 citations, making it the most-cited paper in the analysis of the previous ten years. The study indicates the anomalous Hall effect (AHE) in single-layer graphene exchange coupled to an atomically flat YIG ferromagnetic thin film. The proximity-induced ferromagnetic order in graphene potentially rises to unique transport phenomena such as quantized AHE, which can be beneficial for spintronics. With 377 citations, [PERSON] et al. [36] produced the second most cited paper. The research reports a significant coupling between exchange-coupled YIG spins and a superconducting microwave resonator. Exchange-coupled gallium-doped YIG film is ideal for cavity quantum electrodynamics (QED) experiments and microwave applications. [PERSON] et al. [18] received 349 citations in their third-ranked paper. The research analyses the spin Hall magnetoresistance effect in pulsed laser-deposited YIG/platinum (PLD). SMR is a novel, easy to measure magnetoresistance effect that enables new spin-current research, the appropriate film for use in spintronics. Based on Tables 1 and 2, the top three papers were published by the American Physical Society (APS), with _Physical Review Letters_[13; 36] and _Physical Review_[18] having an IF of 9.185 and 3.908, respectively.  
In summary for the top 10 papers, preparation methods of YIG film using PLD [8; 13; 14; 15], MBE [18], LPE [20], and sputter deposition [5] were reported. The impact factors for the top 10 papers range between 1.54 and 3.971 (refer to Table 1). In the top  
Figure 4: Publishing countries that have contributed to YIG papers during the last ten years.  
ten papers, more than five authors collaborated to generate high-quality publications, with the most authors contributing to the ninth-ranked paper (sixteen authors in total) [15]. Most papers [8; 13; 15; 18; 20; 68; 69] grew YIG film for spintronic device development, whereas a few papers [5; 14; 36] grew YIG for microwave applications.