NMR study of magnetic state of Mn in Y-Mn intermetallic compounds: YMn2, Y6Mn23 and YMn12

doi:10.1016/0304-8853(83)90010-0

Journal of Magnetism and Magnetic Materials

Volume 40, Issues 1–2, 2 December 1983, Pages 55-60

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Abstract

⁵⁵Mn spin-echo NMR spectra of the magnetically ordered states of YMn₂, Y₆Mn₂₃ and YMn₁₂ intermetallic compounds and their field-dependence have been observed at 4.2 K. The analysis of the spectra of YMn₂ has suggested that YMn₂ is an antiferromagnet with a [111] easy direction of magnetization. This result is consistent with the neutron diffraction study of this material. In the YMn₁₂ compound, a field dependence of the ⁵⁵Mn NMR spectrum similar to that of YMn₂ has been observed. The hyperfine coupling constant associated with the Mn 3d moment is estimated to be 42.7 kOe/μ_B in both YMn₂ and YMn₁₂, whereas Y₆Mn₂₃ shows a slightly larger value because of the ferrimagnetic transferred hyperfine field from the neighboring Mn moments.

References (11)

Y. Nakamura et al.
Physica
(1983)
Y. Nakamura
J. Magn. Magn. Mat.
(1983)
M. Shiga et al.
J. Magn. Magn. Mat.
(1983)
J. Deportes et al.
Solid State Commun.
(1976)
J. Deportes et al.
Physica
(1977)

There are more references available in the full text version of this article.

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NMR study of magnetic state of Mn in Y-Mn intermetallic compounds: YMn2, Y6Mn23 and YMn12

Abstract

Physica

J. Magn. Magn. Mat.

J. Magn. Magn. Mat.

Solid State Commun.

Physica

NMR study of magnetic state of Mn in Y-Mn intermetallic compounds: YMn₂, Y₆Mn₂₃ and YMn₁₂