Out-of-plane and in-plane magnetization behavior of dipolar interacting FeNi nanoislands around the percolation threshold
Identifikátory výsledku
Kód výsledku v IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F16%3A00468974" target="_blank" >RIV/68378271:_____/16:00468974 - isvavai.cz</a>
Výsledek na webu
<a href="http://dx.doi.org/10.1155/2016/3190260" target="_blank" >http://dx.doi.org/10.1155/2016/3190260</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1155/2016/3190260" target="_blank" >10.1155/2016/3190260</a>
Alternativní jazyky
Jazyk výsledku
angličtina
Název v původním jazyce
Out-of-plane and in-plane magnetization behavior of dipolar interacting FeNi nanoislands around the percolation threshold
Popis výsledku v původním jazyce
Magnetic properties of inhomogeneous nanoisland FeNi films were studied by SQUID magnetometry. The FeNi films with nominal thickness ranging from 0.6 to 2.0 nm were deposited by rf sputtering on Sitall glass substrates and covered by a protecting Al2O3 layer on the top. The SQUID data indicate pronounced irreversibility behavior for the out-of-plane temperature-dependent magnetization response (measured at H ≃ 100 Oe) using zero-field cooling (ZFC) and field-cooled warming (FCW) after the applied dc magnetizing field H m ≃ 2 T for the FeNi samples with nominal thickness 1.1 nm ≲ d ≲ 1.8 nm, below the percolation threshold. The positive difference between the FCW and ZFC data identifies two irreversibility temperature scales, T B 50 K and T 200 K, which can be associated with the superparamagnetic and superferromagnetic behavior in inhomogeneous nanoisland FeNi films, respectively. However, above the film percolation threshold, we observed a crossover from the out-of-plane to in-plane magnetization orientation. Here, the in-plane FCW-ZFC difference implies negative remanent magnetization response in the temperature range T B ≲ T ≲ T . The observed magnetization properties can be associated with the presence of the superferromagnetic phase in self-assembled clusters of quasi-2D metallic magnetic FeNi nanoislands.
Název v anglickém jazyce
Out-of-plane and in-plane magnetization behavior of dipolar interacting FeNi nanoislands around the percolation threshold
Popis výsledku anglicky
Magnetic properties of inhomogeneous nanoisland FeNi films were studied by SQUID magnetometry. The FeNi films with nominal thickness ranging from 0.6 to 2.0 nm were deposited by rf sputtering on Sitall glass substrates and covered by a protecting Al2O3 layer on the top. The SQUID data indicate pronounced irreversibility behavior for the out-of-plane temperature-dependent magnetization response (measured at H ≃ 100 Oe) using zero-field cooling (ZFC) and field-cooled warming (FCW) after the applied dc magnetizing field H m ≃ 2 T for the FeNi samples with nominal thickness 1.1 nm ≲ d ≲ 1.8 nm, below the percolation threshold. The positive difference between the FCW and ZFC data identifies two irreversibility temperature scales, T B 50 K and T 200 K, which can be associated with the superparamagnetic and superferromagnetic behavior in inhomogeneous nanoisland FeNi films, respectively. However, above the film percolation threshold, we observed a crossover from the out-of-plane to in-plane magnetization orientation. Here, the in-plane FCW-ZFC difference implies negative remanent magnetization response in the temperature range T B ≲ T ≲ T . The observed magnetization properties can be associated with the presence of the superferromagnetic phase in self-assembled clusters of quasi-2D metallic magnetic FeNi nanoislands.
Klasifikace
Druh
J<sub>imp</sub> - Článek v periodiku v databázi Web of Science
CEP obor
—
OECD FORD obor
10302 - Condensed matter physics (including formerly solid state physics, supercond.)
Návaznosti výsledku
Projekt
<a href="/cs/project/GA15-13778S" target="_blank" >GA15-13778S: Studium epitaxních jevů ve feroelektrických nanovrstvách pomocí spektrální elipsometrie</a><br>
Návaznosti
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Ostatní
Rok uplatnění
2016
Kód důvěrnosti údajů
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Údaje specifické pro druh výsledku
Název periodika
Journal of Nanomaterials
ISSN
1687-4110
e-ISSN
—
Svazek periodika
2016
Číslo periodika v rámci svazku
Oct
Stát vydavatele periodika
US - Spojené státy americké
Počet stran výsledku
9
Strana od-do
—
Kód UT WoS článku
000390013000001
EID výsledku v databázi Scopus
2-s2.0-85006173370