The main objective of the review was to investigate the ferromagnetism of diluted magnetic semiconductors made of Mn‐doped GaAs. Manganese‐doped gallium arsenide has recently become an important field of research because of its potential applications in the fields of spintronics and magnetic devices. The magnetic moment caused by adding manganese to the GaAs crystal structure causes a low‐temperature ferromagnetic behavior. The main factor that affects the ferromagnetic properties of Mn‐doped gallium arsenic is manganese concentration. Understanding the relationship between Mn concentration and magnetic properties is important for material optimization in specific applications. It was found that Mn‐doped GaAs exhibit paramagnetic behavior below a specific critical concentration. However, the substance is transformed into a ferromagnetic state over the maximum concentration. The Curie temperature is an important additional factor influencing the ferromagnetic properties of Mn‐doped GaAs. The temperature at which a material ceases to exhibit ferromagnetic behavior is known as the Curie temperature. The Curie temperature of a material depends on its Mn concentration, thin film thickness, and degree of disturbance. A reduction in magnetic resistance increases the concentration of Mn‐treated gallium arsenic and increases its rate as it reaches its maximum value. High Curie temperatures are the result of stronger magnetic interactions resulting from higher manganese concentrations. The specific heat capacity of Mn‐doped gallium arsenide is influenced by its magnetic and structural contribution.
{"title":"Effects of manganese concentration and temperature on the ferromagnetism of manganese‐doped gallium arsenide semiconductor","authors":"Birhanu Abera, Bawoke Mekuye","doi":"10.1002/nano.202300084","DOIUrl":"https://doi.org/10.1002/nano.202300084","url":null,"abstract":"The main objective of the review was to investigate the ferromagnetism of diluted magnetic semiconductors made of Mn‐doped GaAs. Manganese‐doped gallium arsenide has recently become an important field of research because of its potential applications in the fields of spintronics and magnetic devices. The magnetic moment caused by adding manganese to the GaAs crystal structure causes a low‐temperature ferromagnetic behavior. The main factor that affects the ferromagnetic properties of Mn‐doped gallium arsenic is manganese concentration. Understanding the relationship between Mn concentration and magnetic properties is important for material optimization in specific applications. It was found that Mn‐doped GaAs exhibit paramagnetic behavior below a specific critical concentration. However, the substance is transformed into a ferromagnetic state over the maximum concentration. The Curie temperature is an important additional factor influencing the ferromagnetic properties of Mn‐doped GaAs. The temperature at which a material ceases to exhibit ferromagnetic behavior is known as the Curie temperature. The Curie temperature of a material depends on its Mn concentration, thin film thickness, and degree of disturbance. A reduction in magnetic resistance increases the concentration of Mn‐treated gallium arsenic and increases its rate as it reaches its maximum value. High Curie temperatures are the result of stronger magnetic interactions resulting from higher manganese concentrations. The specific heat capacity of Mn‐doped gallium arsenide is influenced by its magnetic and structural contribution.","PeriodicalId":510500,"journal":{"name":"Nano Select","volume":"154 ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-11-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139246784","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Mohammed Lawal, Joseph Payne, H. Onyeaka, AbdulKabir Mahmud Alao, Emmanuel Okoampah
The issue of food fraud, safety and contaminants remains a topic of public concern, as it has been aligned to potential food scarcity. However, nanotechnology presents a promising opportunity for improving various industries, including food, agriculture, and health. This article aims to examine the potential of nanotechnology in enhancing food safety in Ghana, and its efficacy in addressing prevalent food safety challenges. Nano‐based approaches, such as nano‐packaging, nano‐sensing, nano‐additives, and other nano‐techniques, are discussed as effective methods for addressing major and emerging food safety issues in Ghana, such as food contaminants, antimicrobial resistance, food fraud and adulteration, and poor sanitary conditions. Additionally, the ethical and safety implications of these nano‐based approaches and particles are also deliberated.
{"title":"Boosting food safety in Ghana: Exploring the future of nanotechnology","authors":"Mohammed Lawal, Joseph Payne, H. Onyeaka, AbdulKabir Mahmud Alao, Emmanuel Okoampah","doi":"10.1002/nano.202300078","DOIUrl":"https://doi.org/10.1002/nano.202300078","url":null,"abstract":"The issue of food fraud, safety and contaminants remains a topic of public concern, as it has been aligned to potential food scarcity. However, nanotechnology presents a promising opportunity for improving various industries, including food, agriculture, and health. This article aims to examine the potential of nanotechnology in enhancing food safety in Ghana, and its efficacy in addressing prevalent food safety challenges. Nano‐based approaches, such as nano‐packaging, nano‐sensing, nano‐additives, and other nano‐techniques, are discussed as effective methods for addressing major and emerging food safety issues in Ghana, such as food contaminants, antimicrobial resistance, food fraud and adulteration, and poor sanitary conditions. Additionally, the ethical and safety implications of these nano‐based approaches and particles are also deliberated.","PeriodicalId":510500,"journal":{"name":"Nano Select","volume":"108 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-11-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139255425","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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