2011/01/11 by Kuntal Roy, Supriyo Bandyopadhyay, Jayasimha Atulasimha
Engineering · Materials Science · Physics and Astronomy · #Advanced Memory and Neural Computing #Anisotropy energy #Computer science #Condensed matter physics #Domain wall (magnetism) #Electrical engineering #Energy (signal processing) #Energy harvesting #Engineering #Ferroelectric and Piezoelectric Materials #Ferromagnetism #Magnetic anisotropy #Magnetic field #Magnetization #Magnetostriction #Materials science #Micromagnetics #Multiferroics and related materials #Nanomagnet #Optoelectronics #Physics #Piezoelectricity #SIGNAL (programming language) #Spintronics #Voltage #cond-mat.mes-hall
paper · pdf · doi:10.1063/1.3624900
published as Appl. Phys. Lett., 99, 063108 (2011)
arxiv created 2011/01/11 · openalex publication_date 2011/08/08 · arxiv updated 2015/03/17 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
The authors show that the magnetization of a 2-phase magnetostrictive/piezoelectric multiferroic single-domain shape-anisotropic nanomagnet can be switched with very small voltages that generate strain in the magnetostrictive layer. This can be the basis of ultralow power computing and signal processing. With appropriate material choice, the energy dissipated per switching event can be reduced to ∼45 kT at room temperature for a switching delay of ∼100 ns and ∼70 kT for a switching delay of ∼10 ns, if the energy barrier separating the two stable magnetization directions is ∼32 kT. Such devices can be powered by harvesting energy exclusively from the environment without the need for a battery.