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Magnetic behavior of the BaFe4-2xSn2+xCoxO11 system: From cluster glass to kagome phase
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The cationic distribution of the solid solution
BaFe
4
−
2
x
Sn
2
+
x
Co
x
O
11
(0≤x≤2) has been determined by using combined neutron and x-ray diffraction. A very strong cation site selectivity has been found: Sn atoms do not enter 4f(1/2) sites at all, but this site is occupied by both Fe and Co atoms. On the other hand Sn atoms exhibit a strong preference for the 4e sites where Co atoms do not enter in any case. 6g sites are occupied by the three cations without any preference. No long-range magnetic ordering has been detected in any of the samples, but short-range three-dimensional ferrimagnetic ordering occurs below a temperature
T
N
that decreases as x increases. Below
T
N
down to
T
F
, the system is composed of a set of ferrimagnetic clusters of finite size. A second magnetic transition to a spin-glass-like phase is observed in all the samples at
T
F
, and this transition is attributed to the intrinsic frustration of the 6g sites arranged in a kagome$aa— lattice.
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MARTÍNEZ BENJAMIN, Joan Josep, et al. Magnetic behavior of the BaFe4-2xSn2+xCoxO11 system: From cluster glass to kagome phase. Physical Review B. 1993. Vol. 48, num. 22, pags. 16440-16448. ISSN 0163-1829. [consulted: 24 of May of 2026]. Available at: https://hdl.handle.net/2445/9884