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The ion fluences ranged from\n \n \n \n <\/jats:tex-math>\n \n \n \n 10<\/mml:mn>\n \n 12<\/mml:mn>\n <\/mml:mrow>\n <\/mml:msup>\n <\/mml:mrow>\n \n \n \u00a0c<\/mml:mtext>\n <\/mml:mrow>\n \n \n \n m<\/mml:mtext>\n <\/mml:mrow>\n \n \u2212<\/mml:mo>\n 2<\/mml:mn>\n <\/mml:mrow>\n <\/mml:msup>\n <\/mml:mrow>\n <\/mml:math>\n <\/jats:inline-formula>\n to\n \n \n \n <\/jats:tex-math>\n \n \n \u00a0<\/mml:mtext>\n <\/mml:mrow>\n 5<\/mml:mn>\n \u00a0<\/mml:mtext>\n \n \n \u00a0<\/mml:mtext>\n \u00d7<\/mml:mo>\n \u00a0<\/mml:mtext>\n <\/mml:mrow>\n <\/mml:mrow>\n \u00a0<\/mml:mtext>\n \n \n 10<\/mml:mn>\n \n 15<\/mml:mn>\n <\/mml:mrow>\n <\/mml:msup>\n <\/mml:mrow>\n \n \n \u00a0c<\/mml:mtext>\n <\/mml:mrow>\n \n \n \n m<\/mml:mtext>\n <\/mml:mrow>\n \n \u2212<\/mml:mo>\n 2<\/mml:mn>\n <\/mml:mrow>\n <\/mml:msup>\n <\/mml:mrow>\n <\/mml:math>\n <\/jats:inline-formula>\n . Below\n \n \n \n <\/jats:tex-math>\n \n \n \u00a0<\/mml:mtext>\n <\/mml:mrow>\n \n \n 10<\/mml:mn>\n \n 14<\/mml:mn>\n <\/mml:mrow>\n <\/mml:msup>\n <\/mml:mrow>\n \n \n \u00a0c<\/mml:mtext>\n <\/mml:mrow>\n \n \n \n m<\/mml:mtext>\n <\/mml:mrow>\n \n \u2212<\/mml:mo>\n 2<\/mml:mn>\n <\/mml:mrow>\n <\/mml:msup>\n <\/mml:mrow>\n <\/mml:math>\n <\/jats:inline-formula>\n , the anisotropy of the Ta-capped FeCoB free layer was weakly modulated, following a decrease in the saturation magnetization. The tunnel magnetoresistance (TMR), along with the exchange-bias and the interlayer exchange coupling providing a stable magnetic configuration to the reference layer, decreased continuously. Above\n \n \n \n <\/jats:tex-math>\n \n \n \n 10<\/mml:mn>\n \n 14<\/mml:mn>\n <\/mml:mrow>\n <\/mml:msup>\n <\/mml:mrow>\n \n \n \u00a0c<\/mml:mtext>\n <\/mml:mrow>\n \n \n \n m<\/mml:mtext>\n <\/mml:mrow>\n \n \u2212<\/mml:mo>\n 2<\/mml:mn>\n <\/mml:mrow>\n <\/mml:msup>\n <\/mml:mrow>\n <\/mml:math>\n <\/jats:inline-formula>\n , a strong decrease in the saturation magnetization was accompanied by a loss of the magnetic coupling and of the TMR. We show there is an ion-fluence window where the modulation of magnetic anisotropy can occur while preserving a large TMR and stable magnetic configuration of the MTJ, and demonstrate that the layers surrounding the free layer play a decisive role in determining the trend of the magnetic anisotropy modulation resulting from the irradiation. Our results provide guidance for the tailoring of MTJ parameters via ion irradiation, which we propose as a potentially suitable technique for setting the magnetic easy-cone state in MTJ for attaining field-free, fast, and non-stochastic magnetization switching.\n <\/jats:p>","DOI":"10.1088\/1361-6463\/aba38c","type":"journal-article","created":{"date-parts":[[2020,7,7]],"date-time":"2020-07-07T18:30:20Z","timestamp":1594146620000},"page":"455003","update-policy":"https:\/\/doi.org\/10.1088\/crossmark-policy","source":"Crossref","is-referenced-by-count":11,"title":["Ar\n +<\/sup>\n ion irradiation of magnetic tunnel junction multilayers: impact on the magnetic and electrical properties"],"prefix":"10.1088","volume":"53","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-9317-5322","authenticated-orcid":false,"given":"B M S","family":"Teixeira","sequence":"first","affiliation":[]},{"given":"A A","family":"Timopheev","sequence":"additional","affiliation":[]},{"ORCID":"https:\/\/orcid.org\/0000-0001-8847-2034","authenticated-orcid":false,"given":"N","family":"Ca\u00e7oilo","sequence":"additional","affiliation":[]},{"given":"L","family":"Cuchet","sequence":"additional","affiliation":[]},{"given":"J","family":"Mondaud","sequence":"additional","affiliation":[]},{"given":"J R","family":"Childress","sequence":"additional","affiliation":[]},{"given":"S","family":"Magalh\u00e3es","sequence":"additional","affiliation":[]},{"ORCID":"https:\/\/orcid.org\/0000-0003-0633-8937","authenticated-orcid":false,"given":"E","family":"Alves","sequence":"additional","affiliation":[]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9420-8130","authenticated-orcid":false,"given":"N A","family":"Sobolev","sequence":"additional","affiliation":[]}],"member":"266","published-online":{"date-parts":[[2020,8,12]]},"reference":[{"key":"daba38cbib1","doi-asserted-by":"publisher","first-page":"0802B3","DOI":"10.7567\/JJAP.56.0802B3","type":"journal-article","volume":"56","author":"Narita","year":"2017","journal-title":"Japan. 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All rights, including for text and data mining, AI training, and similar technologies, are reserved.","name":"copyright_information","label":"Copyright Information"},{"value":"2020-04-27","name":"date_received","label":"Date Received","group":{"name":"publication_dates","label":"Publication dates"}},{"value":"2020-07-07","name":"date_accepted","label":"Date Accepted","group":{"name":"publication_dates","label":"Publication dates"}},{"value":"2020-08-12","name":"date_epub","label":"Online publication date","group":{"name":"publication_dates","label":"Publication dates"}}]}}