1. Antiferromagnetic long-range order caused by nonmagnetic impurities; magnetization of single-crystal Cu1−xZnxGeO3
- Author
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Kenzou Manabe, M. Hase, Akihito Sawa, Yoshitaka Sasago, Kunimitsu Uchinokura, and N. Koide
- Subjects
Magnetic anisotropy ,Hysteresis ,Magnetization ,Materials science ,Condensed matter physics ,Transition temperature ,Antiferromagnetism ,Electrical and Electronic Engineering ,Condensed Matter Physics ,Single crystal ,Magnetic susceptibility ,Electronic, Optical and Magnetic Materials ,Magnetic field - Abstract
The magnetization was obtained as a function of temperature and magnetic field of a Cu 1− x Zn x GeO 3 single-crystal with x ∼ 0.04. The temperature dependence of the magnetic susceptibility in 0.1 T parallel to the c axis shows a clear cusp around 4.5 K and decreases rapidly below 4.5 K. There is no hysteresis between the data measured in zero-field-cooling and field-cooling processes. The field dependence of the magnetization parallel to the c axis at 2.0 K exhibits an apparent increase around 1.0 T, which corresponds to a spin-flop transition. The temperature and field dependences, the anisotropy, and the absence of the hysteresis undoubtedly prove the occurrence of an antiferromagnetic long-range order below 4.5 K instead of the spin-glass-like transition reported previously. Spins below the transition temperature are ordered almost parallel to the c axis. This is the first report of magnetic long-range order caused by nonmagnetic impurities.
- Published
- 1995
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