Magnetic and magnetotransport properties of arrays of nanostructured antidots obtained by self-assembling polystyrene nanosphere lithography

Journal Article · Sat May 15 00:00:00 EDT 2010 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.3350902· OSTI ID:21476213

Tiberto, Paola; Boarino, Luca; Celegato, Federica; Coiesson, Marco; De Leo, Natascia; Vinai, Franco ^[1]; Allia, Paolo ^[2]

---

1. INRIM, Strada delle Cacce 91, Torino I-10135 (Italy)
2. DISMIC, Politecnico di Torino, Corso Duca degli Abruzzi 24, Torino, 1-10129 (Italy)

A well-ordered nanopatterned structure has been obtained in sputtered magnetic thin films by self-assembling of polystyrene nanospheres. Arrays of holes in Co, Ni, and Ni{sub 80}Fe{sub 20} films having a mean size ranging in the interval of 200-400 nm depending on the experimental condition have been prepared. Sample microstructure has been studied by scanning electron microscopy and atomic force microscopy. Room-temperature hysteresis loops have been measured in the parallel and perpendicular configuration (H{sub max}=20 kOe). Magnetoresistance (MR) measurements have been performed by means of a standard four-contact technique at several angles between the current and the magnetic field (H{sub max}=70 kOe) in the temperature interval of 4-200 K. An anisotropic MR effect has been observed in all compositions independent on the hole mean dimension. The role on magnetic and magnetotransport properties of either sample microstructure or composition has been studied in such patterned structures.

• OSTI ID: 21476213
• Journal Information: Journal of Applied Physics, Vol. 107, Issue 9; Conference: 11. joint MMM-Intermag conference, Washington, DC (United States), 18-22 Jan 2010; Other Information: DOI: 10.1063/1.3350902; (c) 2010 American Institute of Physics; ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
77 NANOSCIENCE AND NANOTECHNOLOGY
ANISOTROPY
ATOMIC FORCE MICROSCOPY
COBALT
HYSTERESIS
INTERMETALLIC COMPOUNDS
IRON
MAGNETIC FIELDS
MAGNETIC MATERIALS
MAGNETORESISTANCE
MICROSTRUCTURE
NICKEL
POLYSTYRENE
QUANTUM DOTS
SCANNING ELECTRON MICROSCOPY
SPUTTERING
SURFACE COATING
TEMPERATURE DEPENDENCE
THIN FILMS
ALLOYS
DEPOSITION
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ELECTRON MICROSCOPY
ELEMENTS
FILMS
MATERIALS
METALS
MICROSCOPY
NANOSTRUCTURES
ORGANIC COMPOUNDS
ORGANIC POLYMERS
PETROCHEMICALS
PETROLEUM PRODUCTS
PHYSICAL PROPERTIES
PLASTICS
POLYMERS
POLYOLEFINS
POLYVINYLS
SYNTHETIC MATERIALS
TRANSITION ELEMENTS