This book undertakes an extensive exploration of manganese-based compounds, such as T1 SrxMnO3 (T = La, Pr; x = 0.35, 0.25) using density functional theory and Monte Carlo simulations with a focus on understanding their electronic, magnetic, and magnetocaloric properties. Ba1 SrxFeO3 (x = 0, 0.2) is also studied via different approximations, offering a comparative perspective. In addition, the book looks at the influence of magnetism using Monte Carlo simulations, revealing crucial parameters and examining the GdCrO3 system through DFT and Monte Carlo simulation, shedding light on recent experimental observations. Additionally, Monte Carlo studies investigate magnetic and magnetocaloric features of Sr2FeMoO6, La2SrMn2O7 bilayer manganite, perovskite ferromagnetic thin films' surface effects, and SmFe1 MnxO3 perovskite. In essence, this book significantly advances our comprehension of magnetic and magnetocaloric phenomena across diverse materials and is well-suited for both experimentalists and computational researchers working in this field.

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Professor Rachid Masrour, from Morocco, is a research professor in the Faculty of Sciences at Dhar El Mahraz, Sidi Mohamed Ben Abdellah University, Fez, Morocco. Dr. Rachid Masrour completed his Ph.D. in March 2006 at the same university. His research interests lie in the area of Condensed Matter Physics, Material Sciences, Materials for energy, and Magnetism. He has 340 articles published in the Web of Science and 10 book chapters published in international journals. He is the editor of 4 books and the author of 2 books with an h-index of 34. He participated in more than 100 Moroccan and international congresses. He's a referee for several articles and also an Editorial Board Member in different international journals. He has collaborated extensively with laboratories from abroad. He was honored with the International Association of Advanced Materials Young Scientist Medal in recognition of his contribution to "Magnetism, Electromagnetism, and Spintronics" and delivered a lecture at the Advanced Materials World Congress on October 11 - 14, 2022. He is one of the world's most cited top scientists in material physics (top 2%, Stanford University Ranking, US, 2020). He received the Best Oral Presentation Award for MCGPD-2021, by the Indian Association for Crystal Growth & Indian Science and Technology Association International Organization for Crystal Growth, July 5-8, 2021. He received the Outstanding Scientist Award (VDGOOD PROFESSIONAL ASSOCIATION, February 15, 2020, India). It was among the most critical in 2020 by Elsevier.