Gandhi AC, Huang CY, Yang CC, Chan TS, Cheng CL, Ma YR, Wu SY. Growth mechanism and magnon excitation in NiO nanowalls.
NANOSCALE RESEARCH LETTERS 2011;
6:485. [PMID:
21824408 PMCID:
PMC3211999 DOI:
10.1186/1556-276x-6-485]
[Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/31/2011] [Accepted: 08/08/2011] [Indexed: 05/27/2023]
Abstract
The nanosized effects of short-range multimagnon excitation behavior and short-circuit diffusion in NiO nanowalls synthesized using the Ni grid thermal treatment method were observed. The energy dispersive spectroscopy mapping technique was used to characterize the growth mechanism, and confocal Raman scattering was used to probe the antiferromagnetic exchange energy J2 between next-nearest-neighboring Ni ions in NiO nanowalls at various growth temperatures below the Neel temperature. This study shows that short spin correlation leads to an exponential dependence of the growth temperatures and the existence of nickel vacancies during the magnon excitation. Four-magnon configurations were determined from the scattering factor, revealing a lowest state and monotonic change with the growth temperature.PACS: 75.47.Lx; 61.82.Rx; 75.50.Tt; 74.25.nd; 72.10.Di.
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