The magnetic anisotropy of the quantum-critical spin-chain system YbAlO\(_3\) is studied in detail in its paramagnetic phase by means of electron spin resonance. We find an uniaxial g factor anisotropy with \(g_\parallel =7.01\) and \(g_\perp = 0.47\). The existence of two distinct magnetic Yb sites explains the resonance spectra well.

中文翻译：

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通过电子自旋共振研究 YbAlO $$_3$$ 3 中的磁各向异性

量子临界自旋链系统YbAlO \(_3\)的磁各向异性通过电子自旋共振在其顺磁相中进行了详细研究。我们发现具有\(g_\parallel =7.01\)和\(g_\perp = 0.47\)的单轴g因子各向异性。两个不同的磁性 Yb 位点的存在很好地解释了共振光谱。