{"title":"用穆斯堡尔谱研究超顺磁性氧化铁粒子的磁弛豫","authors":"Eiji Kita;Reisho Onodera;Mikio Kishimoto;Hideto Yanagihara","doi":"10.1109/LMAG.2023.3264115","DOIUrl":null,"url":null,"abstract":"A Mössbauer spectroscopy (MS) study was performed on the superparamagnetic commercially available magnetic fluid, Resovist, with temperatures varying between room temperature and 2.6 K. Two samples were prepared for MS study, one dried specimen and the other frozen. At the lowest temperature of 2.6 K, the spectrum was characteristic of maghemite, and superparamagnetic relaxation was observed with increasing temperature. On the spectrum recorded at 250 K, fitting was performed using the three components in the Blume–Tjon two-state magnetic relaxation model, which resulted in relaxation times of \n<inline-formula><tex-math>$3.8 \\times 10^{-8}$</tex-math></inline-formula>\n, \n<inline-formula><tex-math>$1.7 \\times 10^{-8}$</tex-math></inline-formula>\n, and \n<inline-formula><tex-math>$6.4 \\times 10^{-10}$</tex-math></inline-formula>\n s for the three components.","PeriodicalId":13040,"journal":{"name":"IEEE Magnetics Letters","volume":"14 ","pages":"1-5"},"PeriodicalIF":1.1000,"publicationDate":"2023-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Magnetic Relaxation of Superparamagnetic Fe Oxide Particles Studied With Mössbauer Spectroscopy\",\"authors\":\"Eiji Kita;Reisho Onodera;Mikio Kishimoto;Hideto Yanagihara\",\"doi\":\"10.1109/LMAG.2023.3264115\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"A Mössbauer spectroscopy (MS) study was performed on the superparamagnetic commercially available magnetic fluid, Resovist, with temperatures varying between room temperature and 2.6 K. Two samples were prepared for MS study, one dried specimen and the other frozen. At the lowest temperature of 2.6 K, the spectrum was characteristic of maghemite, and superparamagnetic relaxation was observed with increasing temperature. On the spectrum recorded at 250 K, fitting was performed using the three components in the Blume–Tjon two-state magnetic relaxation model, which resulted in relaxation times of \\n<inline-formula><tex-math>$3.8 \\\\times 10^{-8}$</tex-math></inline-formula>\\n, \\n<inline-formula><tex-math>$1.7 \\\\times 10^{-8}$</tex-math></inline-formula>\\n, and \\n<inline-formula><tex-math>$6.4 \\\\times 10^{-10}$</tex-math></inline-formula>\\n s for the three components.\",\"PeriodicalId\":13040,\"journal\":{\"name\":\"IEEE Magnetics Letters\",\"volume\":\"14 \",\"pages\":\"1-5\"},\"PeriodicalIF\":1.1000,\"publicationDate\":\"2023-04-03\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"IEEE Magnetics Letters\",\"FirstCategoryId\":\"101\",\"ListUrlMain\":\"https://ieeexplore.ieee.org/document/10091100/\",\"RegionNum\":4,\"RegionCategory\":\"物理与天体物理\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q4\",\"JCRName\":\"ENGINEERING, ELECTRICAL & ELECTRONIC\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"IEEE Magnetics Letters","FirstCategoryId":"101","ListUrlMain":"https://ieeexplore.ieee.org/document/10091100/","RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"ENGINEERING, ELECTRICAL & ELECTRONIC","Score":null,"Total":0}
Magnetic Relaxation of Superparamagnetic Fe Oxide Particles Studied With Mössbauer Spectroscopy
A Mössbauer spectroscopy (MS) study was performed on the superparamagnetic commercially available magnetic fluid, Resovist, with temperatures varying between room temperature and 2.6 K. Two samples were prepared for MS study, one dried specimen and the other frozen. At the lowest temperature of 2.6 K, the spectrum was characteristic of maghemite, and superparamagnetic relaxation was observed with increasing temperature. On the spectrum recorded at 250 K, fitting was performed using the three components in the Blume–Tjon two-state magnetic relaxation model, which resulted in relaxation times of
$3.8 \times 10^{-8}$
,
$1.7 \times 10^{-8}$
, and
$6.4 \times 10^{-10}$
s for the three components.
期刊介绍:
IEEE Magnetics Letters is a peer-reviewed, archival journal covering the physics and engineering of magnetism, magnetic materials, applied magnetics, design and application of magnetic devices, bio-magnetics, magneto-electronics, and spin electronics. IEEE Magnetics Letters publishes short, scholarly articles of substantial current interest.
IEEE Magnetics Letters is a hybrid Open Access (OA) journal. For a fee, authors have the option making their articles freely available to all, including non-subscribers. OA articles are identified as Open Access.