Collective magnetic response of inhomogeneous nanoisland FeNi films around the percolation transition

0490146 - FZÚ 2019 RIV NL eng J - Journal Article
Kovaleva, N.N. - Bagdinov, A.V. - Stupakov, Alexandr - Dejneka, Alexandr - Demikhov, E.I. - Gorbatsevich, A.A. - Pudonin, F.A. - Kugel, K.I. - Kusmartsev, F.V.
Collective magnetic response of inhomogeneous nanoisland FeNi films around the percolation transition.
Journal of Nanoparticle Research. Roč. 20, č. 4 (2018), s. 1-14, č. článku 109. ISSN 1388-0764. E-ISSN 1572-896X
Institutional support: RVO:68378271
Keywords : nanoisland FeNi permalloy films * SQUID magnetometry * FeNi/TiO₂ interface * inhomogeneous nanoscale domain arrays * collective high-field magnetic response
OECD category: Condensed matter physics (including formerly solid state physics, supercond.)
Impact factor: 2.009, year: 2018

By using superconducting quantum interference device (SQUID) magnetometry, we investigated anisotropic high-field (H < 7T) low temperature (10 K) magnetization response of inhomogeneous nanoisland FeNi films grown by rf sputtering deposition on Sitall (TiO2) glass substrates. In the grown FeNi films, the FeNi layer nominal thickness varied from 0.6 to 2.5 nm, across the percolation transition at the dc = 1.8 nm. We discovered that, beyond conventional spin-magnetism of Fe21Ni79 permalloy, the extracted out-of-plane magnetization response of the nanoisland FeNi films is not saturated in the range of investigated magnetic fields and exhibits paramagnetic-like behavior.
Permanent Link: http://hdl.handle.net/11104/0284439