Room temperature Co-doped manganite/graphene sensor operating at high pulsed magnetic fields
Peržiūrėti/ Atidaryti
Data
2019Autorius
Lukošė, Rasuolė
Žurauskienė, Nerija
Stankevič, Voitech
Vagner, Milita
Plaušinaitienė, Valentina
Niaura, Gediminas
Keršulis, Skirmantas
Balevičius, Saulius
Bolli, Eleonora
Mezzi, Alessio
Kaciulis, Saulius
Metaduomenys
Rodyti detalų aprašąSantrauka
The demand to increase the sensitivity to magnetic field in a broad magnetic field ranges has led to the research of novel materials for sensor applications. Therefore, the hybrid system consisting of two different magnetoresistive materials – nanostructured Co-doped manganite La1−xSrx(Mn1−yCoy)zO3 and single- and few-layer graphene – were combined and investigated as potential system for magnetic field sensing. The negative colossal magnetoresistance (CMR) of manganite-cobaltite and positive one of graphene gives the possibility to increase the sensitivity to magnetic field of the hybrid sensor. The performed magnetoresistance (MR) measurements of individual few layer (n = 1–5) graphene structures revealed the highest MR values for three-layer graphene (3LG), whereas additional Co-doping increased the MR values of nanostructured manganite films. The connection of 3LG graphene and Co-doped magnanite film in a voltage divider configuration significantly increased the sensitivity of the hybrid sensor at low and intermediate magnetic fields (1–2 T): 70 mV/VT of hybrid sensor in comparison with 56 mV/VT for 3LG and 12 mV/VT for Co-doped magnanite film, respectively, and broadened the magnetic field operation range (0.1–20) T of the produced sensor prototype.