The effect of matrix and substrate on the coercivity and blocking temperature of self-assembled Ni nanoparticles

dc.contributorVirginia Tech. Department of Materials Science and Engineeringen
dc.contributorVirginia Tech. Department of Mechanical Engineeringen
dc.contributorVirginia Tech. Laboratory for Oxide Research and Education (L.O.R.E.)en
dc.contributorKorea Basic Science Institute. Division of Electron Microscopic Researchen
dc.contributorNorth Carolina A&T State University. Department of Mechanical and Chemical Engineeringen
dc.contributorNorth Carolina A&T State University. Center for Advanced Materials and Smart Structuresen
dc.contributorOak Ridge National Laboratory. Condensed Matter Sciences Divisionen
dc.contributorUniversity of Alabama. Department of Chemistryen
dc.contributorUniversity of Alabama. Chemical Engineering and Center for Materials for Information Technology (MINT)en
dc.contributor.authorAbiade, Jeremiah T.en
dc.contributor.authorOh, Sang Hoen
dc.contributor.authorKumar, Dhananjayen
dc.contributor.authorVarela, Mariaen
dc.contributor.authorPennycook, Stephen J.en
dc.contributor.authorGuo, Haizhongen
dc.contributor.authorGupta, Arunavaen
dc.contributor.authorSankar, Jagannathanen
dc.contributor.departmentMaterials Science and Engineering (MSE)en
dc.description.abstractWe have shown that the magnetic properties of nanoparticles may be tuned from superparamagnetic to ferromagnetic by changing the substrate or thin film matrix in which they are embedded. Nickel nanoparticles were embedded into alumina, titanium nitride, and cerium oxide matrices on both silicon and sapphire substrates via pulsed laser deposition. The laser ablation time on the nickel target was kept constant. Only nickel nanoparticles in cerium oxide showed characteristics of ferromagnetism (room temperature coercivity and remanence). Ni nanoparticles, in either alumina or titanium nitride, possessed blocking temperatures below 200 K. Detailed scanning transmission electron microscopy analysis has been conducted on the samples embedded into cerium oxide on both substrates and related to the magnetic data. (c) 2008 American Institute of Physics.en
dc.description.sponsorshipNational Science Foundation (U.S.). Nanoscale Interdisciplinary Research Team - 4-46109 NCAT and NSF-DMR 0213985 MINT-UAen
dc.description.sponsorshipUnited States. Department of Energy. Division of Materials Science and Engineeringen
dc.format.extent7 pagesen
dc.identifier.citationAbiade, Jeremiah T., Oh, Sang Ho, Kumar, Dhananjay, Varela, Maria, Pennycook, Stephen, Guo, Haizhong, Gupta, Arunava, Sankar, Jagannathan (2008). The effect of matrix and substrate on the coercivity and blocking temperature of self-assembled Ni nanoparticles. Journal of Applied Physics, 104(7). doi: 10.1063/1.2992528en
dc.publisherAmerican Institute of Physicsen
dc.rightsIn Copyrighten
dc.subjectCoercive forceen
dc.subjectThin film growthen
dc.titleThe effect of matrix and substrate on the coercivity and blocking temperature of self-assembled Ni nanoparticlesen
dc.title.serialJournal of Applied Physicsen
dc.typeArticle - Refereeden
Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
634.95 KB
Adobe Portable Document Format