Naslov
Magnetic anisotropy of low-dimensional CuSeO3

Autori
Herak, Mirta ; Pajić, Damir ; Živković, Ivica ; Berger, Helmuth

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
2nd workshop on recent advances in broad-band solid-state NMR of correlated electronic systems / - , 2011

Skup
Recent advances in broad-band solid-state NMR of correlated electronic systems

Mjesto i datum
Trogir, Hrvatska, 04.09.2011. - 09.09.2011

Vrsta sudjelovanja
Poster

Vrsta recenzije
Nije recenziran

Ključne riječi
magnetic anisotropy; low-dimensional spin systems

Sažetak
We present the first study of magnetism of monoclinic CuSeO3. At high temperatures the system is paramagnetic and at Tmax = 17 K the susceptibility has a maximum suggesting a low dimensional underlying magnetic lattice. From consideration of possible Cu-O-Cu paths, we propose a magnetic lattice of spin tetramers. At TN=8 K the system undergoes a phase transition to long range AFM order. The spin axis direction in the ordered state is determined. Angular dependence of torque was measured in both the PM and the AFM state. A large rotation of the magnetic axes confined to the ac plane in the PM phase was detected from torque and confirmed by ESR measurements. The temperature dependence of susceptibility anisotropy suggest possible presence of anisotropic exchange. Both symmetric and antisymmetric anisotropic exchange (Dzyaloshinskii-Moriya interaction) are possible in this system. To determine which is present/dominant, microscopic techniques such as ESR and NMR need to be employed. Some effort in that direction concerning ESR has already been made. The NMR measurements are planned in the near future.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

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