Probing interspatial magnetic flux distributions in ferromagnetic stripe arrays by specular and off-specular polarized neutron scattering
Edge roughness in magnetic stripe arrays is an important structural parameter with a sizable impact on magnetic domains, domain correlation, pinning and propagation of domain walls in micro- and nanostripes proposed for data storage and logic devices. We have investigated two different stripe arrays...
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| Veröffentlicht in: | Physical review. B 2020-06, Vol.101 (22), p.1, Article 224404 |
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| creator | Gorkov, D. Toperverg, B. P. Zabel, H. |
| description | Edge roughness in magnetic stripe arrays is an important structural parameter with a sizable impact on magnetic domains, domain correlation, pinning and propagation of domain walls in micro- and nanostripes proposed for data storage and logic devices. We have investigated two different stripe arrays fabricated by lithographic methods from permalloy Fe22Ni78, one with rough edges and another one with smooth edges. Performing polarized neutron reflectivity and polarized neutron off-specular scattering both patterns yield specular reflectivity curves with pronounced Kiessig fringes and well resolved Bragg bands in the off-specular regime due to the lateral periodicity. When applying a saturating magnetic field perpendicular to the stripes, a significant diffuse scattering can be detected close to the total reflection edge where it is enhanced by the Yoneda effect. This diffuse magnetic scattering can be attributed to inhomogeneities of the magnetic induction in the empty space between the stripes. In contrast, the sample with much less edge roughness does not exhibit off-specular diffuse scattering. Thus polarized neutron scattering from stripe patterns is a suitable tool for quantitative characterization of inhomogeneous magnetic flux distribution in the interspace between magnetic stripes invoked by their edge roughness. |
| doi_str_mv | 10.1103/PhysRevB.101.224404 |
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P. ; Zabel, H.</creator><creatorcontrib>Gorkov, D. ; Toperverg, B. P. ; Zabel, H.</creatorcontrib><description>Edge roughness in magnetic stripe arrays is an important structural parameter with a sizable impact on magnetic domains, domain correlation, pinning and propagation of domain walls in micro- and nanostripes proposed for data storage and logic devices. We have investigated two different stripe arrays fabricated by lithographic methods from permalloy Fe22Ni78, one with rough edges and another one with smooth edges. Performing polarized neutron reflectivity and polarized neutron off-specular scattering both patterns yield specular reflectivity curves with pronounced Kiessig fringes and well resolved Bragg bands in the off-specular regime due to the lateral periodicity. When applying a saturating magnetic field perpendicular to the stripes, a significant diffuse scattering can be detected close to the total reflection edge where it is enhanced by the Yoneda effect. This diffuse magnetic scattering can be attributed to inhomogeneities of the magnetic induction in the empty space between the stripes. In contrast, the sample with much less edge roughness does not exhibit off-specular diffuse scattering. 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P.</creatorcontrib><creatorcontrib>Zabel, H.</creatorcontrib><title>Probing interspatial magnetic flux distributions in ferromagnetic stripe arrays by specular and off-specular polarized neutron scattering</title><title>Physical review. B</title><description>Edge roughness in magnetic stripe arrays is an important structural parameter with a sizable impact on magnetic domains, domain correlation, pinning and propagation of domain walls in micro- and nanostripes proposed for data storage and logic devices. We have investigated two different stripe arrays fabricated by lithographic methods from permalloy Fe22Ni78, one with rough edges and another one with smooth edges. Performing polarized neutron reflectivity and polarized neutron off-specular scattering both patterns yield specular reflectivity curves with pronounced Kiessig fringes and well resolved Bragg bands in the off-specular regime due to the lateral periodicity. When applying a saturating magnetic field perpendicular to the stripes, a significant diffuse scattering can be detected close to the total reflection edge where it is enhanced by the Yoneda effect. This diffuse magnetic scattering can be attributed to inhomogeneities of the magnetic induction in the empty space between the stripes. In contrast, the sample with much less edge roughness does not exhibit off-specular diffuse scattering. Thus polarized neutron scattering from stripe patterns is a suitable tool for quantitative characterization of inhomogeneous magnetic flux distribution in the interspace between magnetic stripes invoked by their edge roughness.</description><subject>Arrays</subject><subject>Data storage</subject><subject>Domain walls</subject><subject>Electronic devices</subject><subject>Ferromagnetism</subject><subject>Ferrous alloys</subject><subject>Magnetic alloys</subject><subject>Magnetic domains</subject><subject>Magnetic flux</subject><subject>Magnetic induction</subject><subject>Magnetism</subject><subject>Neutron flux</subject><subject>Neutron scattering</subject><subject>Neutrons</subject><subject>Periodic variations</subject><subject>Reflectance</subject><subject>Roughness</subject><subject>Wave dispersion</subject><issn>2469-9950</issn><issn>2469-9969</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2020</creationdate><recordtype>article</recordtype><recordid>eNo9kN1KAzEQhRdRsNQ-gTcBr7dOku3u5lKLf1CwiF4vSTapKdtkTbLi-ga-tSnV3swMZw5zhi_LLjHMMQZ6vX4fw4v6vJ1jwHNCigKKk2xCipLljJXs9Dgv4DybhbAFAFwCq4BNsp-1d8LYDTI2Kh96Hg3v0I5vrIpGIt0NX6g1IXojhmicDcmItPLeHT37Za8Q956PAYkRhV7JoeMecdsip3V-FHqXqvlWLbJqiN5ZFCSPKTh9cJGdad4FNfvr0-zt_u51-Zivnh-eljerXJKqijnmDEMpBJRccyV5wbisJSF1SQFYrVW5KLCuNJUlhpaIFnMhaJ1ACNxS1tJpdnW423v3MagQm60bvE2RDSkIq2FR0Tq56MElvQvBK9303uy4HxsMzR578489Cbg5YKe_6MN7_Q</recordid><startdate>20200601</startdate><enddate>20200601</enddate><creator>Gorkov, D.</creator><creator>Toperverg, B. 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P. ; Zabel, H.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c277t-1a9106bb06afaeca49ac8c228630098fe6541f7f3c610d2bd1abb38969b1d39d3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2020</creationdate><topic>Arrays</topic><topic>Data storage</topic><topic>Domain walls</topic><topic>Electronic devices</topic><topic>Ferromagnetism</topic><topic>Ferrous alloys</topic><topic>Magnetic alloys</topic><topic>Magnetic domains</topic><topic>Magnetic flux</topic><topic>Magnetic induction</topic><topic>Magnetism</topic><topic>Neutron flux</topic><topic>Neutron scattering</topic><topic>Neutrons</topic><topic>Periodic variations</topic><topic>Reflectance</topic><topic>Roughness</topic><topic>Wave dispersion</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Gorkov, D.</creatorcontrib><creatorcontrib>Toperverg, B. P.</creatorcontrib><creatorcontrib>Zabel, H.</creatorcontrib><collection>CrossRef</collection><collection>Engineered Materials Abstracts</collection><collection>Solid State and Superconductivity Abstracts</collection><collection>METADEX</collection><collection>Technology Research Database</collection><collection>Aerospace Database</collection><collection>Materials Research Database</collection><collection>Advanced Technologies Database with Aerospace</collection><jtitle>Physical review. B</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Gorkov, D.</au><au>Toperverg, B. P.</au><au>Zabel, H.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Probing interspatial magnetic flux distributions in ferromagnetic stripe arrays by specular and off-specular polarized neutron scattering</atitle><jtitle>Physical review. B</jtitle><date>2020-06-01</date><risdate>2020</risdate><volume>101</volume><issue>22</issue><spage>1</spage><pages>1-</pages><artnum>224404</artnum><issn>2469-9950</issn><eissn>2469-9969</eissn><abstract>Edge roughness in magnetic stripe arrays is an important structural parameter with a sizable impact on magnetic domains, domain correlation, pinning and propagation of domain walls in micro- and nanostripes proposed for data storage and logic devices. We have investigated two different stripe arrays fabricated by lithographic methods from permalloy Fe22Ni78, one with rough edges and another one with smooth edges. Performing polarized neutron reflectivity and polarized neutron off-specular scattering both patterns yield specular reflectivity curves with pronounced Kiessig fringes and well resolved Bragg bands in the off-specular regime due to the lateral periodicity. When applying a saturating magnetic field perpendicular to the stripes, a significant diffuse scattering can be detected close to the total reflection edge where it is enhanced by the Yoneda effect. This diffuse magnetic scattering can be attributed to inhomogeneities of the magnetic induction in the empty space between the stripes. In contrast, the sample with much less edge roughness does not exhibit off-specular diffuse scattering. Thus polarized neutron scattering from stripe patterns is a suitable tool for quantitative characterization of inhomogeneous magnetic flux distribution in the interspace between magnetic stripes invoked by their edge roughness.</abstract><cop>College Park</cop><pub>American Physical Society</pub><doi>10.1103/PhysRevB.101.224404</doi><orcidid>https://orcid.org/0000-0001-5543-391X</orcidid><orcidid>https://orcid.org/0000-0001-5166-7997</orcidid><orcidid>https://orcid.org/0000-0002-5983-2771</orcidid></addata></record> |
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| subjects | Arrays Data storage Domain walls Electronic devices Ferromagnetism Ferrous alloys Magnetic alloys Magnetic domains Magnetic flux Magnetic induction Magnetism Neutron flux Neutron scattering Neutrons Periodic variations Reflectance Roughness Wave dispersion |
| title | Probing interspatial magnetic flux distributions in ferromagnetic stripe arrays by specular and off-specular polarized neutron scattering |
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