Abstract
Magnetic properties of Ho 2Fe 14B compounds have been studied by the 57Fe Mössbauer effect and magnetization measurements. The axes of easy and hard magnetizations lie along the [001] and the [100] directions in the tetragonal structure, respectively, above T sc = 58 K. From the comparison of the Mössbauer results with the magnetization measurements, it became clear that the Fe and the Ho moments tilt collinearly from the c-axis to the [110] direction throughout the temperature range of 4.2–58 K, and the canting angle reaches to 22° at 4.2 K. The Mössbauer spectra are consistently resolved with six subspectra above T sc and with twelve below T sc, together with reasonable site-assignments. We have estimated the mean Ho moment at 10.0μ B, using the mean Fe moment of 2.3μ B derived from the average hyperfine field or using the magnetization of Y 2Fe 14B as the Fe-sublattice magnetization of Ho 2Fe 14B.
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