Naslov
Easy plane anisotropy in Bi2CuO4

Autori
Herak, Mirta ; Miljak, Marko ; Dhalenne, Guy ; Revcolevschi, Alexandre

Izvornik
Journal of physics. Condensed matter (0953-8984) 22 (2010), 2; 026006-1

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
magnetic susceptibility; magnetic anisotropy; torque magnetometry; Bi2CuO4

Sažetak
Dc magnetic susceptibility measurements and the torque magnetometry were used to experimentally probe the symmetry of the antiferromagnetically (AFM) ordered state of Bi2CuO4. A phenomenological approach to the anisotropy energy is used to model the angular dependence of torque for easy axis and easy plane anisotropy. Comparison of these results with the experimentally obtained curves leads to the conclusion that antiferromagnetically ordered state in Bi2CuO4 has an easy plane anisotropy with the c plane as an easy plane. The estimated value of the critical field for the spin–flop in the easy plane is Hc = 15−20 kOe giving the easy plane anisotropy energy constant K22 = 27−47·10^3 erg/mol. The resulting antiferromagnetic structure contains two equally populated mutually perpendicular AFM domains in zero magnetic field.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

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