TY - JOUR

T1 - Multifilamentary character of anticorrelated capacitive and resistive switching in memristive structures based on (Co-Fe-B)x (LiNb O3)100-x nanocomposite

AU - Martyshov, M. N.

AU - Emelyanov, A. V.

AU - Demin, V. A.

AU - Nikiruy, K. E.

AU - Minnekhanov, A. A.

AU - Nikolaev, S. N.

AU - Taldenkov, A. N.

AU - Ovcharov, A. V.

AU - Presnyakov, M. Yu

AU - Sitnikov, A. V.

AU - Vasiliev, A. L.

AU - Forsh, P. A.

AU - Granovsky, A. B.

AU - Kashkarov, P. K.

AU - Kovalchuk, M. V.

AU - Rylkov, V. V.

N1 - Publisher Copyright: © 2020 American Physical Society.

PY - 2020/9

Y1 - 2020/9

N2 - Resistive and capacitive switching in capacitor metal/nanocomposite/metal (M/NC/M) structures based on (Co-Fe-B)x(LiNbO3)100-x NC fabricated by ion-beam sputtering with metal content x ≈ 8-20 at. % is studied. The peculiarity of the structure synthesis was the use of increased oxygen content (approximately equal to 2 × 10-5 Torr) at the initial stage of the NC growth. The NC films, along with metal nanogranules of 3-6 nm in size, contained a large number of dispersed Co (Fe) atoms (up to approximately 1022 cm-3). Measurements are performed both in dc and ac (frequency range 5-13 MHz) regimes. When switching structures from high-resistance (Roff) to low-resistance (Ron) state, the effect of a strong increase in their capacity is found, which reaches 8 times at x ≈ 15 at. % and the resistance ratio Roff:Ron ≈ 40. The effect is explained by the synergetic combination of the multifilamentary character of resistive switching (RS) and structural features of the samples associated, in particular, with the formation of a high-resistance and strongly polarizable LiNbO3 layer near the bottom electrode of the structures. The proposed model is confirmed by investigations of RS of two-layer nanoscale M/NC/LiNbO3/M structures as well as by studies of the magnetization of M/NC/M structures in the pristine state and after RS.

AB - Resistive and capacitive switching in capacitor metal/nanocomposite/metal (M/NC/M) structures based on (Co-Fe-B)x(LiNbO3)100-x NC fabricated by ion-beam sputtering with metal content x ≈ 8-20 at. % is studied. The peculiarity of the structure synthesis was the use of increased oxygen content (approximately equal to 2 × 10-5 Torr) at the initial stage of the NC growth. The NC films, along with metal nanogranules of 3-6 nm in size, contained a large number of dispersed Co (Fe) atoms (up to approximately 1022 cm-3). Measurements are performed both in dc and ac (frequency range 5-13 MHz) regimes. When switching structures from high-resistance (Roff) to low-resistance (Ron) state, the effect of a strong increase in their capacity is found, which reaches 8 times at x ≈ 15 at. % and the resistance ratio Roff:Ron ≈ 40. The effect is explained by the synergetic combination of the multifilamentary character of resistive switching (RS) and structural features of the samples associated, in particular, with the formation of a high-resistance and strongly polarizable LiNbO3 layer near the bottom electrode of the structures. The proposed model is confirmed by investigations of RS of two-layer nanoscale M/NC/LiNbO3/M structures as well as by studies of the magnetization of M/NC/M structures in the pristine state and after RS.

UR - http://www.scopus.com/inward/record.url?scp=85093093050&partnerID=8YFLogxK

U2 - 10.1103/PhysRevApplied.14.034016

DO - 10.1103/PhysRevApplied.14.034016

M3 - Article

AN - SCOPUS:85093093050

VL - 14

JO - Physical Review Applied

JF - Physical Review Applied

SN - 2331-7019

IS - 3

M1 - 034016

ER -