Journal article Open Access

Ion irradiation-induced easy-cone anisotropy in double-MgO free layers for perpendicular magnetic tunnel junctions

B. M. S. Teixeira; A. A. Timopheev; N. F. F. Caçoilo; S. Auffret; R. C. Sousa; B. Dieny; E. Alves; N. A. Sobolev


JSON Export

{
  "files": [
    {
      "links": {
        "self": "https://zenodo.org/api/files/b55feb25-b009-4381-8a2a-f978eca39f0b/Teixeira%20et%20al%20%28AAM%29%20-%20Appl.%20Phys.%20Lett.%20112%2C%20202403%20%282018%29.pdf"
      }, 
      "checksum": "md5:42db6516c59f2f4a6977cd83f04b1c94", 
      "bucket": "b55feb25-b009-4381-8a2a-f978eca39f0b", 
      "key": "Teixeira et al (AAM) - Appl. Phys. Lett. 112, 202403 (2018).pdf", 
      "type": "pdf", 
      "size": 2240519
    }
  ], 
  "owners": [
    90768
  ], 
  "doi": "10.5281/zenodo.3674060", 
  "stats": {
    "version_unique_downloads": 47.0, 
    "unique_views": 20.0, 
    "views": 23.0, 
    "version_views": 23.0, 
    "unique_downloads": 47.0, 
    "version_unique_views": 20.0, 
    "volume": 129950102.0, 
    "version_downloads": 58.0, 
    "downloads": 58.0, 
    "version_volume": 129950102.0
  }, 
  "links": {
    "doi": "https://doi.org/10.5281/zenodo.3674060", 
    "conceptdoi": "https://doi.org/10.5281/zenodo.3674059", 
    "bucket": "https://zenodo.org/api/files/b55feb25-b009-4381-8a2a-f978eca39f0b", 
    "conceptbadge": "https://zenodo.org/badge/doi/10.5281/zenodo.3674059.svg", 
    "html": "https://zenodo.org/record/3674060", 
    "latest_html": "https://zenodo.org/record/3674060", 
    "badge": "https://zenodo.org/badge/doi/10.5281/zenodo.3674060.svg", 
    "latest": "https://zenodo.org/api/records/3674060"
  }, 
  "conceptdoi": "10.5281/zenodo.3674059", 
  "created": "2020-02-19T13:00:44.991485+00:00", 
  "updated": "2020-02-19T19:20:55.312529+00:00", 
  "conceptrecid": "3674059", 
  "revision": 2, 
  "id": 3674060, 
  "metadata": {
    "access_right_category": "success", 
    "doi": "10.5281/zenodo.3674060", 
    "description": "<p>We have used the ferromagnetic resonance in the X-band (9.37&thinsp;GHz) to investigate the effect of 400&thinsp;keV Ar<sup>+</sup> irradiation on the perpendicular magnetic anisotropy (PMA) and Gilbert damping parameter, &alpha;, of double-MgO free layers designed for application in perpendicular magnetic tunnel junctions. The samples comprised a MgO/Fe<sub>72</sub>Co<sub>8</sub>B<sub>20</sub>/X(0.2&thinsp;nm)/Fe<sub>72</sub>Co<sub>8</sub>B<sub>20</sub>/MgO layer stack, where X stands for an ultrathin Ta or W spacer. Samples with two different total FeCoB layer thicknesses, t<sub>FCB</sub>&thinsp;=&amp;thinsp;3.0&thinsp;nm and t<sub>FCB</sub>&thinsp;=&amp;thinsp;2.6&thinsp;nm, were irradiated with ion fluences ranging from 10<sup>12</sup>&thinsp;cm<sup>&minus;2</sup> to 10<sup>16</sup>&thinsp;cm<sup>&minus;2</sup>. The effective first-order PMA field, B<sub>K1</sub>, decreased nearly linearly with the logarithm of the fluence for both FeCoB thicknesses and spacer elements. The decrease in B<sub>K1</sub>, which is likely caused by an ion-induced intermixing at the FeCoB/MgO interfaces, resulted in a reorientation of the magnetization of the free layers with t<sub>FCB</sub>&thinsp;=&amp;thinsp;2.6&thinsp;nm, initially exhibiting a perpendicular easy-axis anisotropy. For intermediate fluences, 10<sup>13</sup>&thinsp;cm<sup>&minus;2</sup> and 10<sup>14</sup>&thinsp;cm<sup>&minus;2</sup>, easy-cone states with different cone angles could be induced in the free layer with a W spacer. Importantly, no corresponding increase in the Gilbert damping was observed. This study shows that ion irradiation can be used to tune the easy-cone anisotropy in perpendicular magnetic tunnel junctions, which is interesting for spintronic applications such as spin-torque magnetic memory devices, oscillators, and sensors.</p>", 
    "language": "eng", 
    "title": "Ion irradiation-induced easy-cone anisotropy in double-MgO free layers for perpendicular magnetic tunnel junctions", 
    "license": {
      "id": "CC-BY-4.0"
    }, 
    "relations": {
      "version": [
        {
          "count": 1, 
          "index": 0, 
          "parent": {
            "pid_type": "recid", 
            "pid_value": "3674059"
          }, 
          "is_last": true, 
          "last_child": {
            "pid_type": "recid", 
            "pid_value": "3674060"
          }
        }
      ]
    }, 
    "grants": [
      {
        "code": "778308", 
        "links": {
          "self": "https://zenodo.org/api/grants/10.13039/501100000780::778308"
        }, 
        "title": "Physical principles of the creation of novel SPINtronic materials on the base of MULTIlayered metal-oxide FILMs for magnetic sensors and MRAM", 
        "acronym": "SPINMULTIFILM", 
        "program": "H2020", 
        "funder": {
          "doi": "10.13039/501100000780", 
          "acronyms": [], 
          "name": "European Commission", 
          "links": {
            "self": "https://zenodo.org/api/funders/10.13039/501100000780"
          }
        }
      }
    ], 
    "version": "Author Accepted Manuscript", 
    "publication_date": "2018-05-15", 
    "creators": [
      {
        "orcid": "0000-0002-9317-5322", 
        "affiliation": "Physics Department and i3N, University of Aveiro, 3810-193 Aveiro, Portugal", 
        "name": "B. M. S. Teixeira"
      }, 
      {
        "affiliation": "Universit\u00e9 Grenoble Alpes, CEA, CNRS, Grenoble INP, INAC, SPINTEC, F-38000 Grenoble, France", 
        "name": "A. A. Timopheev"
      }, 
      {
        "affiliation": "Physics Department and i3N, University of Aveiro, 3810-193 Aveiro, Portugal", 
        "name": "N. F. F. Ca\u00e7oilo"
      }, 
      {
        "affiliation": "Universit\u00e9 Grenoble Alpes, CEA, CNRS, Grenoble INP, INAC, SPINTEC, F-38000 Grenoble, France", 
        "name": "S. Auffret"
      }, 
      {
        "affiliation": "Universit\u00e9 Grenoble Alpes, CEA, CNRS, Grenoble INP, INAC, SPINTEC, F-38000 Grenoble, France", 
        "name": "R. C. Sousa"
      }, 
      {
        "affiliation": "Universit\u00e9 Grenoble Alpes, CEA, CNRS, Grenoble INP, INAC, SPINTEC, F-38000 Grenoble, France", 
        "name": "B. Dieny"
      }, 
      {
        "affiliation": "IPFN, Instituto Superior T\u00e9cnico, Universidade de Lisboa, 2695-066 Bobadela LRS, Portugal", 
        "name": "E. Alves"
      }, 
      {
        "orcid": "0000-0002-9420-8130", 
        "affiliation": "Physics Department and i3N, University of Aveiro, 3810-193 Aveiro, Portugal & National University of Science and Technology \"MISiS,\" 119049 Moscow, Russia", 
        "name": "N. A. Sobolev"
      }
    ], 
    "access_right": "open", 
    "resource_type": {
      "subtype": "article", 
      "type": "publication", 
      "title": "Journal article"
    }, 
    "related_identifiers": [
      {
        "scheme": "doi", 
        "identifier": "10.1063/1.5026854", 
        "relation": "isPreviousVersionOf", 
        "resource_type": "publication-article"
      }, 
      {
        "scheme": "doi", 
        "identifier": "10.5281/zenodo.3674059", 
        "relation": "isVersionOf"
      }
    ]
  }
}
23
58
views
downloads
All versions This version
Views 2323
Downloads 5858
Data volume 130.0 MB130.0 MB
Unique views 2020
Unique downloads 4747

Share

Cite as