Out-of-plane and in-plane magnetization behavior of dipolar interacting FeNi nanoislands around the percolation threshold

Result code in 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>

Result on the web

<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>

Result language

angličtina

Original language name

Out-of-plane and in-plane magnetization behavior of dipolar interacting FeNi nanoislands around the percolation threshold

Original language description

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.

Czech name

—

Czech description

—

Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

10302 - Condensed matter physics (including formerly solid state physics, supercond.)

Project

<a href="/en/project/GA15-13778S" target="_blank" >GA15-13778S: Epitaxial effects in ferrolectric nanofilms probed by spectroscopic ellipsometry</a><br>

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2016

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Journal of Nanomaterials

ISSN

1687-4110

e-ISSN

—

Volume of the periodical

2016

Issue of the periodical within the volume

Oct

Country of publishing house

US - UNITED STATES

Number of pages

9

Pages from-to

—

UT code for WoS article

000390013000001

EID of the result in the Scopus database

2-s2.0-85006173370