J. Nakamura;H. Awano;H. Miyamoto;M. Takahashi;M. Ojima
{"title":"Write/Erase Cyclability of Pt/Co Magneto-Optical Disks","authors":"J. Nakamura;H. Awano;H. Miyamoto;M. Takahashi;M. Ojima","doi":"10.1109/TJMJ.1994.4565897","DOIUrl":null,"url":null,"abstract":"The write/erase cyclability of Co-rich Pt/Co disks was studied, along with factors limiting the cyclability. Annealing experiments suggested that a decrease in CNR results from degradation of the perpendicular magnetic anisotropy in a Pt/Co film heated by an erasing laser beam. The main mechanism of degradation is atomic intermixing at the interface in Pt/Co multilayers. In the case of a Pt/Co film exposed to air, Co might be oxidized during erase cycles. The higher peak temperature of Pt/Co films accelerates the intermixing. Therefore, the number of cycles was increased by adding a heat-diffusive layer to the Pt/Co film in order to lower the peak temperature. For example, Au-coated Pt/Co disks were capable of 10\n<sup>5</sup>\n cycles as a result of a lower peak temperature (430°C), whereas SiN-coated Pt/Co disks, with a peak temperature of 770°C, were capable of only 10\n<sup>2</sup>\n cycles.","PeriodicalId":100647,"journal":{"name":"IEEE Translation Journal on Magnetics in Japan","volume":"9 4","pages":"85-91"},"PeriodicalIF":0.0000,"publicationDate":"1994-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1109/TJMJ.1994.4565897","citationCount":"1","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"IEEE Translation Journal on Magnetics in Japan","FirstCategoryId":"1085","ListUrlMain":"https://ieeexplore.ieee.org/document/4565897/","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 1
Abstract
The write/erase cyclability of Co-rich Pt/Co disks was studied, along with factors limiting the cyclability. Annealing experiments suggested that a decrease in CNR results from degradation of the perpendicular magnetic anisotropy in a Pt/Co film heated by an erasing laser beam. The main mechanism of degradation is atomic intermixing at the interface in Pt/Co multilayers. In the case of a Pt/Co film exposed to air, Co might be oxidized during erase cycles. The higher peak temperature of Pt/Co films accelerates the intermixing. Therefore, the number of cycles was increased by adding a heat-diffusive layer to the Pt/Co film in order to lower the peak temperature. For example, Au-coated Pt/Co disks were capable of 10
5
cycles as a result of a lower peak temperature (430°C), whereas SiN-coated Pt/Co disks, with a peak temperature of 770°C, were capable of only 10
2
cycles.
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