TY - JOUR
T1 - Observation of a half step magnetization in the {Cu3}-type triangular spin ring
AU - Choi, Kwang Yong
AU - Matsuda, Yasuhiro H.
AU - Nojiri, Hiroyuki
AU - Kortz, U.
AU - Hussain, F.
AU - Stowe, Ashley C.
AU - Ramsey, Chris
AU - Dalal, Naresh S.
PY - 2006
Y1 - 2006
N2 - We report pulsed field magnetization and ESR experiments on a {Cu3} nanomagnet, where antiferromagnetically coupled Cu2+ (S=1/2) ions form a slightly distorted triangle. The remarkable feature is the observation of a half step magnetization, hysteresis loops, and an asymmetric magnetization between a positive and a negative field in a fast sweeping external field. This is attributed to an adiabatic change of magnetization. The energy levels determined by ESR unveil that the different mixing nature of a spin chirality of a total S=1/2 Kramers doublet by virtue of Dzyaloshinskii-Moriya interactions is decisive for inducing half step magnetization.
AB - We report pulsed field magnetization and ESR experiments on a {Cu3} nanomagnet, where antiferromagnetically coupled Cu2+ (S=1/2) ions form a slightly distorted triangle. The remarkable feature is the observation of a half step magnetization, hysteresis loops, and an asymmetric magnetization between a positive and a negative field in a fast sweeping external field. This is attributed to an adiabatic change of magnetization. The energy levels determined by ESR unveil that the different mixing nature of a spin chirality of a total S=1/2 Kramers doublet by virtue of Dzyaloshinskii-Moriya interactions is decisive for inducing half step magnetization.
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U2 - 10.1103/PhysRevLett.96.107202
DO - 10.1103/PhysRevLett.96.107202
M3 - Article
AN - SCOPUS:33644910881
SN - 0031-9007
VL - 96
JO - Physical Review Letters
JF - Physical Review Letters
IS - 10
M1 - 107202
ER -