Enhancement of the Dzyaloshinskii-Moriya interaction and domain wall velocity through interface intermixing in Ta/CoFeB/MgO
The interfacial Dzyaloshinskii-Moriya interaction (DMI) plays a crucial role in chiral domain wall (DW) motion, favoring fast DW velocities. We explore the effect of interface disorder on DMI and DW dynamics in perpendicular magnetized Ta/CoFeB/MgO thin films. Light He+ irradiation has been used to...
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| Veröffentlicht in: | Physical review. B 2019-02, Vol.99 (5), p.054431, Article 054431 |
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| creator | Diez, L. Herrera Voto, M. Casiraghi, A. Belmeguenai, M. Roussigné, Y. Durin, G. Lamperti, A. Mantovan, R. Sluka, V. Jeudy, V. Liu, Y. T. Stashkevich, A. Chérif, S. M. Langer, J. Ocker, B. Lopez-Diaz, L. Ravelosona, D. |
| description | The interfacial Dzyaloshinskii-Moriya interaction (DMI) plays a crucial role in chiral domain wall (DW) motion, favoring fast DW velocities. We explore the effect of interface disorder on DMI and DW dynamics in perpendicular magnetized Ta/CoFeB/MgO thin films. Light He+ irradiation has been used to gently engineer interface intermixing on a scale of 0.1 nm. We demonstrate that a slight modification of the Ta/CoFeB interface leads to an increase of the DMI value accompanied by an enhancement of DW velocity in the flow regime. Using micromagnetic simulations based on granular structures, we show that the enhancement of DW velocity is mainly related to an increase in the distribution of magnetic parameters related to the interface. We further infer that the DMI modulation is related to the asymmetric disorder induced by irradiation leading to alloying with the Ta buffer layer. Understanding the role of disorder is therefore crucial for the design of future devices where post-growth interface alloying can be used to finely tune the DMI. |
| doi_str_mv | 10.1103/PhysRevB.99.054431 |
| format | Article |
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Herrera ; Voto, M. ; Casiraghi, A. ; Belmeguenai, M. ; Roussigné, Y. ; Durin, G. ; Lamperti, A. ; Mantovan, R. ; Sluka, V. ; Jeudy, V. ; Liu, Y. T. ; Stashkevich, A. ; Chérif, S. M. ; Langer, J. ; Ocker, B. ; Lopez-Diaz, L. ; Ravelosona, D.</creator><creatorcontrib>Diez, L. Herrera ; Voto, M. ; Casiraghi, A. ; Belmeguenai, M. ; Roussigné, Y. ; Durin, G. ; Lamperti, A. ; Mantovan, R. ; Sluka, V. ; Jeudy, V. ; Liu, Y. T. ; Stashkevich, A. ; Chérif, S. M. ; Langer, J. ; Ocker, B. ; Lopez-Diaz, L. ; Ravelosona, D.</creatorcontrib><description>The interfacial Dzyaloshinskii-Moriya interaction (DMI) plays a crucial role in chiral domain wall (DW) motion, favoring fast DW velocities. We explore the effect of interface disorder on DMI and DW dynamics in perpendicular magnetized Ta/CoFeB/MgO thin films. Light He+ irradiation has been used to gently engineer interface intermixing on a scale of 0.1 nm. We demonstrate that a slight modification of the Ta/CoFeB interface leads to an increase of the DMI value accompanied by an enhancement of DW velocity in the flow regime. Using micromagnetic simulations based on granular structures, we show that the enhancement of DW velocity is mainly related to an increase in the distribution of magnetic parameters related to the interface. We further infer that the DMI modulation is related to the asymmetric disorder induced by irradiation leading to alloying with the Ta buffer layer. Understanding the role of disorder is therefore crucial for the design of future devices where post-growth interface alloying can be used to finely tune the DMI.</description><identifier>ISSN: 2469-9950</identifier><identifier>ISSN: 1098-0121</identifier><identifier>EISSN: 2469-9969</identifier><identifier>EISSN: 1550-235X</identifier><identifier>DOI: 10.1103/PhysRevB.99.054431</identifier><language>eng</language><publisher>College Park: American Physical Society</publisher><subject>Alloying ; Buffer layers ; Condensed Matter ; Domain walls ; Irradiation ; Magnesium oxide ; Magnetic properties ; Other ; Physics ; Thin films</subject><ispartof>Physical review. 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B</title><description>The interfacial Dzyaloshinskii-Moriya interaction (DMI) plays a crucial role in chiral domain wall (DW) motion, favoring fast DW velocities. We explore the effect of interface disorder on DMI and DW dynamics in perpendicular magnetized Ta/CoFeB/MgO thin films. Light He+ irradiation has been used to gently engineer interface intermixing on a scale of 0.1 nm. We demonstrate that a slight modification of the Ta/CoFeB interface leads to an increase of the DMI value accompanied by an enhancement of DW velocity in the flow regime. Using micromagnetic simulations based on granular structures, we show that the enhancement of DW velocity is mainly related to an increase in the distribution of magnetic parameters related to the interface. We further infer that the DMI modulation is related to the asymmetric disorder induced by irradiation leading to alloying with the Ta buffer layer. Understanding the role of disorder is therefore crucial for the design of future devices where post-growth interface alloying can be used to finely tune the DMI.</description><subject>Alloying</subject><subject>Buffer layers</subject><subject>Condensed Matter</subject><subject>Domain walls</subject><subject>Irradiation</subject><subject>Magnesium oxide</subject><subject>Magnetic properties</subject><subject>Other</subject><subject>Physics</subject><subject>Thin films</subject><issn>2469-9950</issn><issn>1098-0121</issn><issn>2469-9969</issn><issn>1550-235X</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2019</creationdate><recordtype>article</recordtype><recordid>eNo9kU1LAzEQhoMoKNU_4CngycO2-dpsc9RqVagooucwzWa70W2iyba6-uddWfU0L8MzLwMPQseUjCklfHJfd-nBbs_HSo1JLgSnO-iACakypaTa_c852UdHKT0TQqgkqiDqAH1d-hq8sWvrWxwq3NYWX3x20IRUO59enMtuQ3QdYOdbG8G0LngMvsRlWIPz-B2aBm9tE4xru_48hs2qHuAKjB3S2n04v-ozfoTJLMzt-eR2dXeI9ipokj36nSP0NL98nF1ni7urm9nZIjNCTtvMUMUkyKKUUvaNU1jm0kxtWVTUECuAMMqmShjJwBRltSxLaSEHWhRkKbgwfIROh94aGv0a3RpipwM4fX220D87wjinjKst7dmTgX2N4W1jU6ufwyb6_j3NGCmoyHkPjxAbKBNDStFW_7WU6B8n-s-JVkoPTvg3bHyCfg</recordid><startdate>20190227</startdate><enddate>20190227</enddate><creator>Diez, L. 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M.</creatorcontrib><creatorcontrib>Langer, J.</creatorcontrib><creatorcontrib>Ocker, B.</creatorcontrib><creatorcontrib>Lopez-Diaz, L.</creatorcontrib><creatorcontrib>Ravelosona, D.</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><collection>Hyper Article en Ligne (HAL)</collection><collection>Hyper Article en Ligne (HAL) (Open Access)</collection><jtitle>Physical review. B</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Diez, L. Herrera</au><au>Voto, M.</au><au>Casiraghi, A.</au><au>Belmeguenai, M.</au><au>Roussigné, Y.</au><au>Durin, G.</au><au>Lamperti, A.</au><au>Mantovan, R.</au><au>Sluka, V.</au><au>Jeudy, V.</au><au>Liu, Y. T.</au><au>Stashkevich, A.</au><au>Chérif, S. M.</au><au>Langer, J.</au><au>Ocker, B.</au><au>Lopez-Diaz, L.</au><au>Ravelosona, D.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Enhancement of the Dzyaloshinskii-Moriya interaction and domain wall velocity through interface intermixing in Ta/CoFeB/MgO</atitle><jtitle>Physical review. B</jtitle><date>2019-02-27</date><risdate>2019</risdate><volume>99</volume><issue>5</issue><spage>054431</spage><pages>054431-</pages><artnum>054431</artnum><issn>2469-9950</issn><issn>1098-0121</issn><eissn>2469-9969</eissn><eissn>1550-235X</eissn><abstract>The interfacial Dzyaloshinskii-Moriya interaction (DMI) plays a crucial role in chiral domain wall (DW) motion, favoring fast DW velocities. We explore the effect of interface disorder on DMI and DW dynamics in perpendicular magnetized Ta/CoFeB/MgO thin films. Light He+ irradiation has been used to gently engineer interface intermixing on a scale of 0.1 nm. We demonstrate that a slight modification of the Ta/CoFeB interface leads to an increase of the DMI value accompanied by an enhancement of DW velocity in the flow regime. Using micromagnetic simulations based on granular structures, we show that the enhancement of DW velocity is mainly related to an increase in the distribution of magnetic parameters related to the interface. We further infer that the DMI modulation is related to the asymmetric disorder induced by irradiation leading to alloying with the Ta buffer layer. Understanding the role of disorder is therefore crucial for the design of future devices where post-growth interface alloying can be used to finely tune the DMI.</abstract><cop>College Park</cop><pub>American Physical Society</pub><doi>10.1103/PhysRevB.99.054431</doi><orcidid>https://orcid.org/0000-0001-7698-8092</orcidid><oa>free_for_read</oa></addata></record> |
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| source | American Physical Society Journals |
| subjects | Alloying Buffer layers Condensed Matter Domain walls Irradiation Magnesium oxide Magnetic properties Other Physics Thin films |
| title | Enhancement of the Dzyaloshinskii-Moriya interaction and domain wall velocity through interface intermixing in Ta/CoFeB/MgO |
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