Double spin-glass-like behavior and antiferromagnetic superexchange interaction between Fe3+ ions in α-Ga2− xFe xO3 (0 ≤ x ≤ 0.4)<xref ref-type="fn" rid="cpb142052fn1">*</xref>

Double spin-glass-like behavior and antiferromagnetic superexchange interaction between Fe³⁺ ions in α-Ga_{2− x}Fe_xO₃ (0 ≤ x ≤ 0.4)*

Lv Yi-Fei†, Xiang Jian-Yong†, Wen Fu-Sheng, Lv Wei-Ming, Hu Wen-Tao, Liu Zhong-Yuan

The AC susceptibility χ _ac measured in a zero dc magnetic field as a function of temperature at the frequencies of 0.5, 0.9, 1, 5, and 7 kHz for α -Ga_{2− x}Fe_xO₃ with (a) x = 0.1, (b) 0.2, (b) 0.3, and (d) 0.4. The top and bottom panel of each figure correspond to the real (

) and imaginary ( χ _ac) parts of χ _ac. The AC driving magnetic field has an amplitude of 5 Oe. Insets of the bottom panel show χ _ac in low temperature range, and arrows show the peak temperature of the corresponding samples.