Observation of a half step magnetization in the {Cu3}-type triangular spin ring.
We report pulsed field magnetization and ESR experiments on a {Cu3} nanomagnet, where antiferromagnetically coupled Cu(2+) (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.
Choi
Kwang-Yong
KY
Institute for Materials Research, Tohoku University, Katahira 2-1-1, Sendai 980-8577, Japan, and CREST, Japan Science and Technology Agency, Japan.
Matsuda
Yasuhiro H
YH
Nojiri
Hiroyuki
H
Kortz
U
U
Hussain
F
F
Stowe
Ashley C
AC
Ramsey
Chris
C
Dalal
Naresh S
NS