The influence of structural disorder on magnetic domain formation in perpendicular anisotropy thin films
Using a combination of resonant soft x-ray scattering, magnetometry, x-ray reflectivity and microscopy techniques we have investigated the magnetic properties and microstructure of a series of perpendicular anisotropy Co/Pt multilayer films with respect to structural disorder tuned by varying the sp...
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| creator | Pierce, M S Davies, J E Turner, J J Chesnel, K Fullerton, E E Nam, J Hailstone, R Kevan, S D Kortright, J B Liu, Kai Sorensen, L B York, B R Hellwig, O |
| description | Using a combination of resonant soft x-ray scattering, magnetometry, x-ray reflectivity and microscopy techniques we have investigated the magnetic properties and microstructure of a series of perpendicular anisotropy Co/Pt multilayer films with respect to structural disorder tuned by varying the sputtering deposition pressure. The observed magnetic changes in domain size, shape and correlation length originate from structural and chemical variations in the samples, such as chemical segregation and grain formation as well as roughness at the surface and interfaces, which are all impacted by the deposition pressure. For low pressure samples we find evidence of a random "gas-like" distribution of magnetic domains, while in the higher pressure samples the domain structure exhibits only short range "liquid-like" positional ordering. The structural and chemical disorder induced by the higher deposition pressure first leads to an increase in the number of magnetic point defects that limit free domain wall propagation. Then, as the sputtering pressure is further increased, the domain wall energy density is lowered due to the formation of local regions with reduced magnetic moment, and finally magnetically void regions appear that confine the magnetic domains and clusters, similar to segregated granular magnetic recording media. |
| doi_str_mv | 10.48550/arxiv.1301.1737 |
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The observed magnetic changes in domain size, shape and correlation length originate from structural and chemical variations in the samples, such as chemical segregation and grain formation as well as roughness at the surface and interfaces, which are all impacted by the deposition pressure. For low pressure samples we find evidence of a random "gas-like" distribution of magnetic domains, while in the higher pressure samples the domain structure exhibits only short range "liquid-like" positional ordering. The structural and chemical disorder induced by the higher deposition pressure first leads to an increase in the number of magnetic point defects that limit free domain wall propagation. Then, as the sputtering pressure is further increased, the domain wall energy density is lowered due to the formation of local regions with reduced magnetic moment, and finally magnetically void regions appear that confine the magnetic domains and clusters, similar to segregated granular magnetic recording media.</description><identifier>EISSN: 2331-8422</identifier><identifier>DOI: 10.48550/arxiv.1301.1737</identifier><language>eng</language><publisher>Ithaca: Cornell University Library, arXiv.org</publisher><subject>Anisotropy ; Cobalt ; Crystal defects ; Deposition ; Domain walls ; Flux density ; Low pressure ; Magnetic domains ; Magnetic measurement ; Magnetic moments ; Magnetic properties ; Magnetic recording ; Magnetic storage ; Multilayers ; Organic chemistry ; Physics - Materials Science ; Platinum ; Point defects ; Recording instruments ; Soft x rays ; Sputtering ; Thin films ; X-ray scattering</subject><ispartof>arXiv.org, 2013-05</ispartof><rights>2013. 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The observed magnetic changes in domain size, shape and correlation length originate from structural and chemical variations in the samples, such as chemical segregation and grain formation as well as roughness at the surface and interfaces, which are all impacted by the deposition pressure. For low pressure samples we find evidence of a random "gas-like" distribution of magnetic domains, while in the higher pressure samples the domain structure exhibits only short range "liquid-like" positional ordering. The structural and chemical disorder induced by the higher deposition pressure first leads to an increase in the number of magnetic point defects that limit free domain wall propagation. Then, as the sputtering pressure is further increased, the domain wall energy density is lowered due to the formation of local regions with reduced magnetic moment, and finally magnetically void regions appear that confine the magnetic domains and clusters, similar to segregated granular magnetic recording media.</description><subject>Anisotropy</subject><subject>Cobalt</subject><subject>Crystal defects</subject><subject>Deposition</subject><subject>Domain walls</subject><subject>Flux density</subject><subject>Low pressure</subject><subject>Magnetic domains</subject><subject>Magnetic measurement</subject><subject>Magnetic moments</subject><subject>Magnetic properties</subject><subject>Magnetic recording</subject><subject>Magnetic storage</subject><subject>Multilayers</subject><subject>Organic chemistry</subject><subject>Physics - Materials Science</subject><subject>Platinum</subject><subject>Point defects</subject><subject>Recording instruments</subject><subject>Soft x rays</subject><subject>Sputtering</subject><subject>Thin films</subject><subject>X-ray scattering</subject><issn>2331-8422</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2013</creationdate><recordtype>article</recordtype><sourceid>BENPR</sourceid><sourceid>GOX</sourceid><recordid>eNotkE1LAzEQhoMgWGrvniTgeWs-m-QoxS8oeOl9md0kNmU3WbNZsf_erfU0DPO8L8OD0B0la6GlJI-Qf8L3mnJC11RxdYUWjHNaacHYDVqN45EQwjaKSckX6LA_OByi7yYXW4eTx2PJU1umDB22YUzZuoxTxD18RldCi23qIUTsU-6hhPkyL4PLg4s2tFMHGUOccyWn4YTL4YyGrh9v0bWHbnSr_7lE-5fn_fat2n28vm-fdhVIKiqplWkdEAW-4d6YhmvplVVNA95YUFRSp7UwhAtHrdVMGbkRG0u0U0QIw5fo_lL7Z6Eecughn-qzjfpsYwYeLsCQ09fkxlIf05Tj_FLNiJaC6rmI_wIlPmQA</recordid><startdate>20130514</startdate><enddate>20130514</enddate><creator>Pierce, M S</creator><creator>Davies, J E</creator><creator>Turner, J J</creator><creator>Chesnel, K</creator><creator>Fullerton, E E</creator><creator>Nam, J</creator><creator>Hailstone, R</creator><creator>Kevan, S D</creator><creator>Kortright, J B</creator><creator>Liu, Kai</creator><creator>Sorensen, L B</creator><creator>York, B R</creator><creator>Hellwig, O</creator><general>Cornell University Library, arXiv.org</general><scope>8FE</scope><scope>8FG</scope><scope>ABJCF</scope><scope>ABUWG</scope><scope>AFKRA</scope><scope>AZQEC</scope><scope>BENPR</scope><scope>BGLVJ</scope><scope>CCPQU</scope><scope>DWQXO</scope><scope>HCIFZ</scope><scope>L6V</scope><scope>M7S</scope><scope>PIMPY</scope><scope>PQEST</scope><scope>PQQKQ</scope><scope>PQUKI</scope><scope>PRINS</scope><scope>PTHSS</scope><scope>GOX</scope></search><sort><creationdate>20130514</creationdate><title>The influence of structural disorder on magnetic domain formation in perpendicular anisotropy thin films</title><author>Pierce, M S ; Davies, J E ; Turner, J J ; Chesnel, K ; Fullerton, E E ; Nam, J ; Hailstone, R ; Kevan, S D ; Kortright, J B ; Liu, Kai ; Sorensen, L B ; York, B R ; Hellwig, O</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-a514-5879cea07afb3f99b385f7d7bbaf9da7151e8849034e1dd82795646d08e704493</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2013</creationdate><topic>Anisotropy</topic><topic>Cobalt</topic><topic>Crystal defects</topic><topic>Deposition</topic><topic>Domain walls</topic><topic>Flux density</topic><topic>Low pressure</topic><topic>Magnetic domains</topic><topic>Magnetic measurement</topic><topic>Magnetic moments</topic><topic>Magnetic properties</topic><topic>Magnetic recording</topic><topic>Magnetic storage</topic><topic>Multilayers</topic><topic>Organic chemistry</topic><topic>Physics - Materials Science</topic><topic>Platinum</topic><topic>Point defects</topic><topic>Recording instruments</topic><topic>Soft x rays</topic><topic>Sputtering</topic><topic>Thin films</topic><topic>X-ray scattering</topic><toplevel>online_resources</toplevel><creatorcontrib>Pierce, M S</creatorcontrib><creatorcontrib>Davies, J E</creatorcontrib><creatorcontrib>Turner, J J</creatorcontrib><creatorcontrib>Chesnel, K</creatorcontrib><creatorcontrib>Fullerton, E E</creatorcontrib><creatorcontrib>Nam, J</creatorcontrib><creatorcontrib>Hailstone, R</creatorcontrib><creatorcontrib>Kevan, S D</creatorcontrib><creatorcontrib>Kortright, J B</creatorcontrib><creatorcontrib>Liu, Kai</creatorcontrib><creatorcontrib>Sorensen, L B</creatorcontrib><creatorcontrib>York, B R</creatorcontrib><creatorcontrib>Hellwig, O</creatorcontrib><collection>ProQuest SciTech Collection</collection><collection>ProQuest Technology Collection</collection><collection>Materials Science & Engineering Collection</collection><collection>ProQuest Central (Alumni Edition)</collection><collection>ProQuest Central UK/Ireland</collection><collection>ProQuest Central Essentials</collection><collection>ProQuest Central</collection><collection>Technology Collection</collection><collection>ProQuest One Community College</collection><collection>ProQuest Central Korea</collection><collection>SciTech Premium Collection</collection><collection>ProQuest Engineering Collection</collection><collection>Engineering Database</collection><collection>Publicly Available Content Database</collection><collection>ProQuest One Academic Eastern Edition (DO NOT USE)</collection><collection>ProQuest One Academic</collection><collection>ProQuest One Academic UKI Edition</collection><collection>ProQuest Central China</collection><collection>Engineering Collection</collection><collection>arXiv.org</collection><jtitle>arXiv.org</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Pierce, M S</au><au>Davies, J E</au><au>Turner, J J</au><au>Chesnel, K</au><au>Fullerton, E E</au><au>Nam, J</au><au>Hailstone, R</au><au>Kevan, S D</au><au>Kortright, J B</au><au>Liu, Kai</au><au>Sorensen, L B</au><au>York, B R</au><au>Hellwig, O</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>The influence of structural disorder on magnetic domain formation in perpendicular anisotropy thin films</atitle><jtitle>arXiv.org</jtitle><date>2013-05-14</date><risdate>2013</risdate><eissn>2331-8422</eissn><abstract>Using a combination of resonant soft x-ray scattering, magnetometry, x-ray reflectivity and microscopy techniques we have investigated the magnetic properties and microstructure of a series of perpendicular anisotropy Co/Pt multilayer films with respect to structural disorder tuned by varying the sputtering deposition pressure. The observed magnetic changes in domain size, shape and correlation length originate from structural and chemical variations in the samples, such as chemical segregation and grain formation as well as roughness at the surface and interfaces, which are all impacted by the deposition pressure. For low pressure samples we find evidence of a random "gas-like" distribution of magnetic domains, while in the higher pressure samples the domain structure exhibits only short range "liquid-like" positional ordering. The structural and chemical disorder induced by the higher deposition pressure first leads to an increase in the number of magnetic point defects that limit free domain wall propagation. 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| subjects | Anisotropy Cobalt Crystal defects Deposition Domain walls Flux density Low pressure Magnetic domains Magnetic measurement Magnetic moments Magnetic properties Magnetic recording Magnetic storage Multilayers Organic chemistry Physics - Materials Science Platinum Point defects Recording instruments Soft x rays Sputtering Thin films X-ray scattering |
| title | The influence of structural disorder on magnetic domain formation in perpendicular anisotropy thin films |
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