{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,7,30]],"date-time":"2025-07-30T11:03:32Z","timestamp":1753873412711,"version":"3.41.2"},"reference-count":18,"publisher":"AIP Publishing","issue":"9","funder":[{"name":"CICYT, Spain","award":["MAT2011-26207"],"award-info":[{"award-number":["MAT2011-26207"]}]}],"content-domain":{"domain":["pubs.aip.org"],"crossmark-restriction":true},"short-container-title":[],"published-print":{"date-parts":[[2014,9,7]]},"abstract":"<jats:p>We report on a comparative study of the exchange bias effect and magnetic properties of Ni-NiO nanoparticulate systems synthesized by the chemical reduction of NiCl2 solution of two different molar concentrations\u20141\u2009M (high) and 0.05\u2009M (low)\u2014followed by annealing of the dried precipitate in the temperature range 400\u2013600\u2009\u00b0C in air. Interestingly, the samples derived from the low molarity solution have higher Ni content and larger crystallite size than those prepared from their high molarity counterparts. These molarity dependent features subsequently modulate the magnitude of the exchange bias field in the samples, which is found to be absent or small in the 0.05\u2009M series, but of moderate value in the 1\u2009M samples. The different physical attributes of the particles derived from different concentrations of Ni-precursor solution are explained by invoking different nucleation kinetics and supersaturation degrees surrounding the viable growing nucleus. Furthermore, an observed increase of exchange bias with increasing annealing temperature, in contrast to the reported agglomeration of particles on annealing and subsequent reduction in bias magnitude, has been explained in correlation to the Ni-NiO interface density.<\/jats:p>","DOI":"10.1063\/1.4894629","type":"journal-article","created":{"date-parts":[[2014,9,5]],"date-time":"2014-09-05T04:23:50Z","timestamp":1409891030000},"update-policy":"https:\/\/doi.org\/10.1063\/aip-crossmark-policy-page","source":"Crossref","is-referenced-by-count":4,"title":["Effect of Ni precursor solution concentration on the magnetic properties and exchange bias of Ni-NiO nanoparticulate systems"],"prefix":"10.1063","volume":"116","author":[{"given":"Aparna","family":"Roy","sequence":"first","affiliation":[{"name":"University of Aveiro 1 Department of Materials and Ceramics Engineering, CICECO, , 3810-193 Aveiro, Portugal"}]},{"given":"J. A.","family":"De Toro","sequence":"additional","affiliation":[{"name":"Universidad de Castilla-La Mancha 2 Departamento de F\u00edsica Aplicada, , 13071 Ciudad Real, Spain"}]},{"given":"V. S.","family":"Amaral","sequence":"additional","affiliation":[{"name":"University of Aveiro 3 Department of Physics, CICECO, , 3810-193 Aveiro, Portugal"}]},{"given":"D. P.","family":"Marques","sequence":"additional","affiliation":[{"name":"Universidad de Castilla-La Mancha 2 Departamento de F\u00edsica Aplicada, , 13071 Ciudad Real, Spain"}]},{"given":"J. M. F.","family":"Ferreira","sequence":"additional","affiliation":[{"name":"University of Aveiro 1 Department of Materials and Ceramics Engineering, CICECO, , 3810-193 Aveiro, Portugal"}]}],"member":"317","published-online":{"date-parts":[[2014,9,4]]},"reference":[{"key":"2023072101301753300_c1","doi-asserted-by":"publisher","first-page":"91","DOI":"10.1016\/j.ssnmr.2005.06.002","volume":"28","year":"2005","journal-title":"Solid State Nucl. Magn. 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