{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,4,13]],"date-time":"2026-04-13T21:26:51Z","timestamp":1776115611971,"version":"3.50.1"},"reference-count":28,"publisher":"MDPI AG","issue":"12","license":[{"start":{"date-parts":[[2017,11,28]],"date-time":"2017-11-28T00:00:00Z","timestamp":1511827200000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/100000001","name":"National Science Foundation","doi-asserted-by":"publisher","award":["1407650"],"award-info":[{"award-number":["1407650"]}],"id":[{"id":"10.13039\/100000001","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Sensors"],"abstract":"<jats:p>Magnetic materials with perpendicular magnetic anisotropy (PMA) have wide-ranging applications in magnetic recording and sensing devices. Multilayers comprised of ferromagnetic and non-magnetic metals (FM\u2013NM) are interesting materials, as their magnetic anisotropy depends strongly on composition and growth parameters. In this context, (Co\/Pd) multilayers have gained huge interest recently due to their robustness and tunable PMA. Here, we report a systematic study of the effect of composition on the magnetic anisotropy of (Co\/Pd) multilayers grown by Direct Current (DC) magnetron sputtering. Four different series of (Co\/Pd)\u00d710 multilayers with different thicknesses of Co and Pd were examined. Vibrating sample magnetometery was used to determine the magnetic anisotropy of these films. X-ray diffraction and transmission electron microscopy experiments were performed to understand the structural morphology of the films. Our results showed that (Co\/Pd)\u00d710 multilayers exhibit PMA when the Co to Pd ratio is less than or equal to 1 and the thickness of Co layers is not more than 5 \u00c5. Maximum effective anisotropy energy is shown by the films with a Co to Pd ratio of 1\/3.<\/jats:p>","DOI":"10.3390\/s17122743","type":"journal-article","created":{"date-parts":[[2017,11,28]],"date-time":"2017-11-28T11:23:50Z","timestamp":1511868230000},"page":"2743","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":30,"title":["Effect of Composition and Thickness on the Perpendicular Magnetic Anisotropy of (Co\/Pd) Multilayers"],"prefix":"10.3390","volume":"17","author":[{"given":"Bharati","family":"Tudu","sequence":"first","affiliation":[{"name":"Department of Materials Science and Engineering, University of Utah, Salt Lake City, UT 84112, USA"},{"name":"Department of Physics, Jadavpur University, Kolkata-700032, India"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Kun","family":"Tian","sequence":"additional","affiliation":[{"name":"Department of Materials Science and Engineering, University of Utah, Salt Lake City, UT 84112, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Ashutosh","family":"Tiwari","sequence":"additional","affiliation":[{"name":"Department of Materials Science and Engineering, University of Utah, Salt Lake City, UT 84112, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2017,11,28]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"1488","DOI":"10.1126\/science.1065389","article-title":"Spintronics: A spin-based electronics vision for the future","volume":"294","author":"Wolf","year":"2001","journal-title":"Science"},{"key":"ref_2","doi-asserted-by":"crossref","first-page":"074003","DOI":"10.1088\/0022-3727\/46\/7\/074003","article-title":"Low-power non-volatile spintronic memory: STT-RAM and beyond","volume":"46","author":"Wang","year":"2013","journal-title":"J. Phys. Appl. Phys."},{"key":"ref_3","doi-asserted-by":"crossref","first-page":"813","DOI":"10.1038\/nmat2024","article-title":"The emergence of spin electronics in data storage","volume":"61","author":"Chappert","year":"2007","journal-title":"Nat. Mater."},{"key":"ref_4","doi-asserted-by":"crossref","first-page":"329","DOI":"10.1016\/j.vacuum.2017.01.031","article-title":"Recent Developments in Perpendicular Magnetic Anisotropy Thin Films for Data Storage Applications","volume":"146","author":"Tudu","year":"2017","journal-title":"Vacuum"},{"key":"ref_5","doi-asserted-by":"crossref","first-page":"413","DOI":"10.1002\/pssr.201105420","article-title":"Materials with perpendicular magnetic anisotropy for magnetic random access memory","volume":"5","author":"Sbiaa","year":"2011","journal-title":"Phys. Status Solidi RRL\u2014Rapid Res. Lett."},{"key":"ref_6","doi-asserted-by":"crossref","first-page":"2","DOI":"10.1063\/1.2750414","article-title":"Perpendicular recording media for hard disk drives","volume":"102","author":"Piramanayagam","year":"2007","journal-title":"J. Appl. Phys."},{"key":"ref_7","doi-asserted-by":"crossref","first-page":"L1","DOI":"10.1016\/0304-8853(96)00062-5","article-title":"Current-driven excitation of magnetic multilayers","volume":"159","author":"Slonczewski","year":"1996","journal-title":"J. Magn. Magn. Mater."},{"key":"ref_8","doi-asserted-by":"crossref","first-page":"9353","DOI":"10.1103\/PhysRevB.54.9353","article-title":"Emission of spin waves by a magnetic multilayer traversed by a current","volume":"54","author":"Berger","year":"1996","journal-title":"Phys. Rev. B"},{"key":"ref_9","doi-asserted-by":"crossref","first-page":"3149","DOI":"10.1103\/PhysRevLett.84.3149","article-title":"Current-driven magnetization reversal and spin-wave excitations in Co\/Cu\/Co pillars","volume":"84","author":"Katine","year":"2000","journal-title":"Phys. Rev. Lett."},{"key":"ref_10","doi-asserted-by":"crossref","first-page":"13","DOI":"10.1145\/2463585.2463589","article-title":"Spin-transfer Torque Magnetic Random Access Memory (STT-MRAM)","volume":"9","author":"Apalkov","year":"2013","journal-title":"J. Emerg. Technol. Comput. Syst."},{"key":"ref_11","doi-asserted-by":"crossref","unstructured":"Kan, J.J., Park, C., Ching, C., Ahn, J., Xue, L., Wang, R., Kontos, A., Liang, S., Bangar, M., and Chen, H. (2016, January 3\u20137). Systematic validation of 2x nm diameter perpendicular MTJ arrays and MgO barrier for sub-10 nm embedded STT-MRAM with practically unlimited endurance. Proceedings of the 2016 IEEE International Electron Devices Meeting (IEDM), San Francisco, CA, USA.","DOI":"10.1109\/IEDM.2016.7838493"},{"key":"ref_12","doi-asserted-by":"crossref","first-page":"2056","DOI":"10.1109\/TMAG.2009.2038929","article-title":"Magnetization dynamics in CoFeB buffered perpendicularly magnetized Co\/Pd multilayer","volume":"46","author":"Sajitha","year":"2010","journal-title":"IEEE Trans. Magn."},{"key":"ref_13","doi-asserted-by":"crossref","unstructured":"Pal, S., Rana, B., Hellwig, O., Thomson, T., and Barman, A. (2011). Tunable magnonic frequency and damping in [Co\/Pd]8 multilayers with variable Co layer thickness. Appl. Phys. Lett., 98.","DOI":"10.1063\/1.3559222"},{"key":"ref_14","doi-asserted-by":"crossref","first-page":"11936","DOI":"10.1103\/PhysRevB.59.11936","article-title":"General Green\u2019s-function formalism for transport calculations with spd Hamiltonians and giant magnetoresistance in Co- and Ni-based magnetic multilayers","volume":"59","author":"Sanvito","year":"1999","journal-title":"Phys. Rev. B"},{"key":"ref_15","doi-asserted-by":"crossref","first-page":"178","DOI":"10.1063\/1.96254","article-title":"Perpendicular magnetic anisotropy in Pd\/Co thin film layered structures","volume":"47","author":"Carcia","year":"1985","journal-title":"Appl. Phys. Lett."},{"key":"ref_16","doi-asserted-by":"crossref","first-page":"9989","DOI":"10.1103\/PhysRevB.50.9989","article-title":"Magnetic anisotropy of a free-standing Co monolayer and of multilayers which contain Co monolayers","volume":"50","author":"Daalderop","year":"1994","journal-title":"Phys. Rev. B"},{"key":"ref_17","doi-asserted-by":"crossref","first-page":"5229","DOI":"10.1103\/PhysRevLett.81.5229","article-title":"Perpendicular magnetic anisotropy caused by interfacial hybridization via enhanced orbital moment in Co\/Pt multilayers: magnetic circular X-ray dichroism study","volume":"81","author":"Nakajima","year":"1998","journal-title":"Phys. Rev. Lett."},{"key":"ref_18","doi-asserted-by":"crossref","first-page":"1409","DOI":"10.1088\/0034-4885\/59\/11\/002","article-title":"Magnetic anisotropy in metallic multilayers","volume":"59","author":"Johnson","year":"1996","journal-title":"Rep. Prog. Phys."},{"key":"ref_19","doi-asserted-by":"crossref","first-page":"2714","DOI":"10.1109\/TMAG.2003.815572","article-title":"Dependence of Co\/Pd superlattice properties on Pd layer thickness","volume":"39","author":"Nemoto","year":"2003","journal-title":"IEEE Trans. Magn."},{"key":"ref_20","doi-asserted-by":"crossref","unstructured":"Chung, W.S., Yang, S.M., Kim, T.W., and Hong, J.P. (2016). Ultrathin Co-O oxide layer-driven perpendicular magnetic anisotropy in a CoO\/[Co\/Pd]m multilayer matrix upon annealing. Sci. Rep., 6.","DOI":"10.1038\/srep37503"},{"key":"ref_21","first-page":"507","article-title":"A comparison of the magnetic anisotropy of [001] and [111] oriented Co\/Pd Multilayers","volume":"49.5","author":"Kuiper","year":"1989","journal-title":"Appl. Phys. A"},{"key":"ref_22","doi-asserted-by":"crossref","first-page":"5066","DOI":"10.1063\/1.340404","article-title":"Perpendicular magnetic anisotropy in Pd\/Co and Pt\/Co thin-film layered structures","volume":"63","author":"Carcia","year":"1988","journal-title":"J. Appl. Phys."},{"key":"ref_23","doi-asserted-by":"crossref","first-page":"6424","DOI":"10.1063\/1.355372","article-title":"Orientational and structural dependence of magnetic anisotropy of Cu\/Ni\/Cu sandwiches: Misfit interface anisotropy","volume":"75","author":"Jungblut","year":"1994","journal-title":"J. Appl. Phys."},{"key":"ref_24","doi-asserted-by":"crossref","unstructured":"Zhang, S., and Zhao, D. (2017). Advances in Magnetic Materials: Processing, Properties, and Performance (582-624), CRC Press.","DOI":"10.4324\/9781315371573"},{"key":"ref_25","doi-asserted-by":"crossref","first-page":"224422","DOI":"10.1103\/PhysRevB.73.224422","article-title":"Magnetic imaging of layer-by-layer reversal in Co\/Pt multilayers with perpendicular anisotropy","volume":"73","author":"Robinson","year":"2006","journal-title":"Phys. Rev. B"},{"key":"ref_26","doi-asserted-by":"crossref","unstructured":"Saji, K.J., Tian, K., Snure, M., and Tiwari, A. (2016). 2D tin monoxide\u2014an unexplored p-type Can der waals semiconductor: Material characteristics and field effect transistors. Adv. Electron. Mater., 2.","DOI":"10.1002\/aelm.201500453"},{"key":"ref_27","doi-asserted-by":"crossref","first-page":"87","DOI":"10.1016\/S0304-8853(01)00305-5","article-title":"Analysis of microstructures for Co\/Pd multilayer perpendicular magnetic recording media with carbon underlayer","volume":"235","author":"Asahi","year":"2001","journal-title":"J. Magn. Magn. Mater."},{"key":"ref_28","doi-asserted-by":"crossref","first-page":"152505","DOI":"10.1063\/1.3374881","article-title":"Perpendicular magnetic anisotropy in Co\/Pt multilayers studied from a view point of anisotropy of magnetic Compton profiles","volume":"96","author":"Ota","year":"2010","journal-title":"Appl. Phys. Lett."}],"container-title":["Sensors"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.mdpi.com\/1424-8220\/17\/12\/2743\/pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,10,11]],"date-time":"2025-10-11T18:51:36Z","timestamp":1760208696000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.mdpi.com\/1424-8220\/17\/12\/2743"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2017,11,28]]},"references-count":28,"journal-issue":{"issue":"12","published-online":{"date-parts":[[2017,12]]}},"alternative-id":["s17122743"],"URL":"https:\/\/doi.org\/10.3390\/s17122743","relation":{},"ISSN":["1424-8220"],"issn-type":[{"value":"1424-8220","type":"electronic"}],"subject":[],"published":{"date-parts":[[2017,11,28]]}}}