## 6 Conclusions and Future Directions  
YIG as a scientific research field is extremely important for an industrial application, with 5429 publications since 1957. This study provides a comprehensive bibliometric analysis of the YIG field's most highly cited works from 2012 to 2022. It is the first time a bibliometric analysis tool has been utilized in the field of YIG. The literature search was conducted using the Scopus database and criteria specific to thin film and magnetic properties. The following are the major conclusions drawn from the bibliometric analysis:  
* \"Thin film\" and \"magnetic properties\" are the main category for which YIG is studied. YIG research has led to a rapid increase in research output from 2012 to 2022 (10 years). The number of papers for the last ten years has risen most since last year (1961 to 2011). Reviewing the top 100 cited papers reveals that 2015 had the most publications compared to other years. * The bibliometric analysis revealed that 19 countries contributed to the YIG field, with the USA contributing the largest papers contributions in YIG research. The USA was the first nation to publish YIG studies (in 1957) related to the formation of the crystalline structure of YIG ([PERSON] _et al._, 2012). The USA exhibited a consistent publication of high-quality papers from 2012 to 2020. The top-ranked study came from the USA, and its author was [PERSON] et al. ([PERSON] _et al._, 2013). It is evident that this technology has reached a high level of global maturity, but further study is still required in the YIG field. * The subject subfields of magnetization characterization attained the highest frequency proportion of citations (91%). Preparation/fabrication of YIG is in the second position, followed by magnon, with a frequency weight of 56% and 54%, respectively. * Pulsed laser deposition (PLD) was the most popular methodology preparation utilized by highly cited papers. YIG films were also fabricated via sputtering and liquid phase epitaxy (LPE) techniques. It was revealed that PLD can make films of good quality for magneto-optical devices. GGG, YAG, silicon, and quartz are substrates for YIG. Most cited papers used GGG substrate for growing YIG films. Researchers have measured numerous characterizations of films, including magnetic, morphological, magneto-optical, structural, electrical, and optical properties. * The keyword findings show that \"iron\" attracted the most interest compared to the other keywords. Nevertheless, additional keywords including \"yttrium iron garnet\", \"garnets\", \"film\", and \"temperature\" had the most importance and attention in YIG research. * _Physical Review B_, having published 28% of the articles, was the journal with the greatest influence on YIG research. Having published 14% of the articles each, _Physical Review Letters_ and _Applied Physics Letters_ were the second-most-cited journals. It is noteworthy that Nature Publishing Group also published YIG publications. Nature Publishing Group publishes one of the world's most widely-read, prominent, high-impact, and high-quality academic journals. * Through a survey of the literature, the following opportunities and challenges have been summarized: lattice mismatch between substrate and YIG, annealing temperature factor, Y-Fe-O phase complexity, and addition of substituents. Recommendations based on identified technological challenges would aid in the achievement of YIG research worldwide and provide a scientific foundation for technology development. There are still several limitations to this study. The bibliometric studies used to identify emerging subjects are limited. The scope of the analysis is limited in that it only identified studies published between 2012 and 2022. In line with the restricted number of publication years, there is a significant citation rate for years before 2012. It was discovered by [PERSON] et al. ([PERSON] _et al._, 2014) in 2002 and received the highest number of citations at -1123, whereas the paper by [PERSON] et al.