Radiation impact of swift heavy ion beams on double-interface CoFeB/MgO magnetic tunnel junctions
A double-interface CoFeB/MgO magnetic tunnel junction (MTJ) has a high thermal stability barrier (E) and high-efficiency magnetization switching with the scaling of device dimensions. However, compared to a single-interface CoFeB/MgO MTJ, its more complicated film stacks and interfaces are more vuln...
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| Veröffentlicht in: | Applied physics letters 2020-04, Vol.116 (17) |
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| creator | Wang, Bi Wang, Zhaohao Du, Ao Qiang, You Cao, Kaihua Zhao, Yuanfu Zheng, Hongchao Yan, Shaohua Zhai, Pengfei Liu, Jie Guo, Gang Bai, Yumeng Wang, Jun Zhao, Weisheng |
| description | A double-interface CoFeB/MgO magnetic tunnel junction (MTJ) has a high thermal stability barrier (E) and high-efficiency magnetization switching with the scaling of device dimensions. However, compared to a single-interface CoFeB/MgO MTJ, its more complicated film stacks and interfaces are more vulnerable to irradiation-induced swift heavy ions. We have studied the irradiation effects of Ta/Kr ions on double-interface CoFeB/MgO MTJs. Structural and physical analyses are performed through transmission electron microscopy, energy dispersive x-ray spectroscopy, and vibrating sample magnetometry. 1907 MeV Ta-ion irradiation damages the interfaces of the double-interface MTJ, resulting in the irreversible decrease in coercivity, while 2060 MeV Kr-ion irradiation damages the bulk properties of the MTJ, leading to the decrease in saturation magnetization. However, the electronic properties of the double-interface MTJ are almost immune to Kr-ion irradiation. |
| doi_str_mv | 10.1063/1.5145124 |
| format | Article |
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However, compared to a single-interface CoFeB/MgO MTJ, its more complicated film stacks and interfaces are more vulnerable to irradiation-induced swift heavy ions. We have studied the irradiation effects of Ta/Kr ions on double-interface CoFeB/MgO MTJs. Structural and physical analyses are performed through transmission electron microscopy, energy dispersive x-ray spectroscopy, and vibrating sample magnetometry. 1907 MeV Ta-ion irradiation damages the interfaces of the double-interface MTJ, resulting in the irreversible decrease in coercivity, while 2060 MeV Kr-ion irradiation damages the bulk properties of the MTJ, leading to the decrease in saturation magnetization. However, the electronic properties of the double-interface MTJ are almost immune to Kr-ion irradiation.</description><identifier>ISSN: 0003-6951</identifier><identifier>EISSN: 1077-3118</identifier><identifier>DOI: 10.1063/1.5145124</identifier><identifier>CODEN: APPLAB</identifier><language>eng</language><publisher>Melville: American Institute of Physics</publisher><subject>Applied physics ; Coercivity ; Heavy ions ; Interfaces ; Ion beams ; Ion irradiation ; Magnesium oxide ; Magnetic measurement ; Magnetic properties ; Magnetic saturation ; Magnetization ; Radiation damage ; Thermal stability ; Tunnel junctions</subject><ispartof>Applied physics letters, 2020-04, Vol.116 (17)</ispartof><rights>Author(s)</rights><rights>2020 Author(s). 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However, compared to a single-interface CoFeB/MgO MTJ, its more complicated film stacks and interfaces are more vulnerable to irradiation-induced swift heavy ions. We have studied the irradiation effects of Ta/Kr ions on double-interface CoFeB/MgO MTJs. Structural and physical analyses are performed through transmission electron microscopy, energy dispersive x-ray spectroscopy, and vibrating sample magnetometry. 1907 MeV Ta-ion irradiation damages the interfaces of the double-interface MTJ, resulting in the irreversible decrease in coercivity, while 2060 MeV Kr-ion irradiation damages the bulk properties of the MTJ, leading to the decrease in saturation magnetization. However, the electronic properties of the double-interface MTJ are almost immune to Kr-ion irradiation.</description><subject>Applied physics</subject><subject>Coercivity</subject><subject>Heavy ions</subject><subject>Interfaces</subject><subject>Ion beams</subject><subject>Ion irradiation</subject><subject>Magnesium oxide</subject><subject>Magnetic measurement</subject><subject>Magnetic properties</subject><subject>Magnetic saturation</subject><subject>Magnetization</subject><subject>Radiation damage</subject><subject>Thermal stability</subject><subject>Tunnel junctions</subject><issn>0003-6951</issn><issn>1077-3118</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2020</creationdate><recordtype>article</recordtype><recordid>eNqdkNFKwzAUhoMoOKcXvkHAK4VuSdMm7aUOp8JkIHod0vRkZqxNTdLJ3t7ODbz36vyH8_Ef-BC6pmRCCWdTOslpltM0O0EjSoRIGKXFKRoRQljCy5yeo4sQ1sOap4yNkHpTtVXRuhbbplM6Ymdw-LYm4k9Q2x3eXypQTcBDqF1fbSCxbQRvlAY8c3N4mL6ulrhRqxai1Tj2bQsbvO5bva8Nl-jMqE2Aq-Mco4_54_vsOVksn15m94tEs1TEhJkMiooUIIzKSaF5DoZnnJrCcJqWVVUTzTIGlJshC13WKQfBNSm5UJzVbIxuDr2dd189hCjXrvft8FKmrMwJz4RIB-r2QGnvQvBgZOdto_xOUiL3BiWVR4MDe3dgg7bx19H_4K3zf6DsasN-AKR3fxg</recordid><startdate>20200427</startdate><enddate>20200427</enddate><creator>Wang, Bi</creator><creator>Wang, Zhaohao</creator><creator>Du, Ao</creator><creator>Qiang, You</creator><creator>Cao, Kaihua</creator><creator>Zhao, Yuanfu</creator><creator>Zheng, Hongchao</creator><creator>Yan, Shaohua</creator><creator>Zhai, Pengfei</creator><creator>Liu, Jie</creator><creator>Guo, Gang</creator><creator>Bai, Yumeng</creator><creator>Wang, Jun</creator><creator>Zhao, Weisheng</creator><general>American Institute of Physics</general><scope>AAYXX</scope><scope>CITATION</scope><scope>8FD</scope><scope>H8D</scope><scope>L7M</scope><orcidid>https://orcid.org/0000-0002-2999-7903</orcidid><orcidid>https://orcid.org/0000-0001-8088-0404</orcidid><orcidid>https://orcid.org/0000-0002-9225-5689</orcidid><orcidid>https://orcid.org/0000-0002-1965-1132</orcidid></search><sort><creationdate>20200427</creationdate><title>Radiation impact of swift heavy ion beams on double-interface CoFeB/MgO magnetic tunnel junctions</title><author>Wang, Bi ; Wang, Zhaohao ; Du, Ao ; Qiang, You ; Cao, Kaihua ; Zhao, Yuanfu ; Zheng, Hongchao ; Yan, Shaohua ; Zhai, Pengfei ; Liu, Jie ; Guo, Gang ; Bai, Yumeng ; Wang, Jun ; Zhao, Weisheng</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c327t-3f4e8b08e7fa508c65ef6461f8f6129bbd0c343e16fbbd7c9d26e76c0967a63d3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2020</creationdate><topic>Applied physics</topic><topic>Coercivity</topic><topic>Heavy ions</topic><topic>Interfaces</topic><topic>Ion beams</topic><topic>Ion irradiation</topic><topic>Magnesium oxide</topic><topic>Magnetic measurement</topic><topic>Magnetic properties</topic><topic>Magnetic saturation</topic><topic>Magnetization</topic><topic>Radiation damage</topic><topic>Thermal stability</topic><topic>Tunnel junctions</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Wang, Bi</creatorcontrib><creatorcontrib>Wang, Zhaohao</creatorcontrib><creatorcontrib>Du, Ao</creatorcontrib><creatorcontrib>Qiang, You</creatorcontrib><creatorcontrib>Cao, Kaihua</creatorcontrib><creatorcontrib>Zhao, Yuanfu</creatorcontrib><creatorcontrib>Zheng, Hongchao</creatorcontrib><creatorcontrib>Yan, Shaohua</creatorcontrib><creatorcontrib>Zhai, Pengfei</creatorcontrib><creatorcontrib>Liu, Jie</creatorcontrib><creatorcontrib>Guo, Gang</creatorcontrib><creatorcontrib>Bai, Yumeng</creatorcontrib><creatorcontrib>Wang, Jun</creatorcontrib><creatorcontrib>Zhao, Weisheng</creatorcontrib><collection>CrossRef</collection><collection>Technology Research Database</collection><collection>Aerospace Database</collection><collection>Advanced Technologies Database with Aerospace</collection><jtitle>Applied physics letters</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Wang, Bi</au><au>Wang, Zhaohao</au><au>Du, Ao</au><au>Qiang, You</au><au>Cao, Kaihua</au><au>Zhao, Yuanfu</au><au>Zheng, Hongchao</au><au>Yan, Shaohua</au><au>Zhai, Pengfei</au><au>Liu, Jie</au><au>Guo, Gang</au><au>Bai, Yumeng</au><au>Wang, Jun</au><au>Zhao, Weisheng</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Radiation impact of swift heavy ion beams on double-interface CoFeB/MgO magnetic tunnel junctions</atitle><jtitle>Applied physics letters</jtitle><date>2020-04-27</date><risdate>2020</risdate><volume>116</volume><issue>17</issue><issn>0003-6951</issn><eissn>1077-3118</eissn><coden>APPLAB</coden><abstract>A double-interface CoFeB/MgO magnetic tunnel junction (MTJ) has a high thermal stability barrier (E) and high-efficiency magnetization switching with the scaling of device dimensions. However, compared to a single-interface CoFeB/MgO MTJ, its more complicated film stacks and interfaces are more vulnerable to irradiation-induced swift heavy ions. We have studied the irradiation effects of Ta/Kr ions on double-interface CoFeB/MgO MTJs. Structural and physical analyses are performed through transmission electron microscopy, energy dispersive x-ray spectroscopy, and vibrating sample magnetometry. 1907 MeV Ta-ion irradiation damages the interfaces of the double-interface MTJ, resulting in the irreversible decrease in coercivity, while 2060 MeV Kr-ion irradiation damages the bulk properties of the MTJ, leading to the decrease in saturation magnetization. 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| subjects | Applied physics Coercivity Heavy ions Interfaces Ion beams Ion irradiation Magnesium oxide Magnetic measurement Magnetic properties Magnetic saturation Magnetization Radiation damage Thermal stability Tunnel junctions |
| title | Radiation impact of swift heavy ion beams on double-interface CoFeB/MgO magnetic tunnel junctions |
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