Magnetic interactions in NiSO4

D. Scheerlinck; C. Peetroons; P. Speybrouck; S. Hautecler; K. Michel

doi:10.1002/pssb.2220720236

Magnetic interactions in NiSO₄

D. Scheerlinck, C. Peetroons, P. Speybrouck, S. Hautecler, K. Michel

Research output › peer-review

Abstract

The energy distributions of neutrons scattered by NiS0₄ in its paramagnetic state are measured by means of a time‐of‐flight technique. Restricting the range of the exchange interactions to the first and second nearest‐neighbours, the relation (J₁/k_B)² + 2(J₂/k_B)² = = (149±7) °K² is obtained from the second moment of these energy distributions. A second relation between the two exchange parameters is obtained from a computation of the Néel temperature in the Green's function approximation. From the two relations J₁/k_B = = (8 ± 0.8) °K and J₂/k_B = (−6.5 ± 0.6) °K are derived. Taking properly into account a temperature‐independent contribution to the susceptibility, no experimental indication is found that there are other significant exchange interactions.

Original language	English
Pages (from-to)	753-760
Number of pages	8
Journal	Physica Status Solidi (B)
Volume	72
Issue number	2
DOIs	https://doi.org/10.1002/pssb.2220720236
State	Published - 1 Dec 1975

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

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10.1002/pssb.2220720236

Cite this

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title = "Magnetic interactions in NiSO4",

abstract = "The energy distributions of neutrons scattered by NiS04 in its paramagnetic state are measured by means of a time‐of‐flight technique. Restricting the range of the exchange interactions to the first and second nearest‐neighbours, the relation (J1/kB)2 + 2(J2/kB)2 = = (149±7) °K2 is obtained from the second moment of these energy distributions. A second relation between the two exchange parameters is obtained from a computation of the N{\'e}el temperature in the Green's function approximation. From the two relations J1/kB = = (8 ± 0.8) °K and J2/kB = (−6.5 ± 0.6) °K are derived. Taking properly into account a temperature‐independent contribution to the susceptibility, no experimental indication is found that there are other significant exchange interactions.",

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T1 - Magnetic interactions in NiSO4

AU - Scheerlinck, D.

AU - Peetroons, C.

AU - Speybrouck, P.

AU - Hautecler, S.

AU - Michel, K.

PY - 1975/12/1

Y1 - 1975/12/1

N2 - The energy distributions of neutrons scattered by NiS04 in its paramagnetic state are measured by means of a time‐of‐flight technique. Restricting the range of the exchange interactions to the first and second nearest‐neighbours, the relation (J1/kB)2 + 2(J2/kB)2 = = (149±7) °K2 is obtained from the second moment of these energy distributions. A second relation between the two exchange parameters is obtained from a computation of the Néel temperature in the Green's function approximation. From the two relations J1/kB = = (8 ± 0.8) °K and J2/kB = (−6.5 ± 0.6) °K are derived. Taking properly into account a temperature‐independent contribution to the susceptibility, no experimental indication is found that there are other significant exchange interactions.

AB - The energy distributions of neutrons scattered by NiS04 in its paramagnetic state are measured by means of a time‐of‐flight technique. Restricting the range of the exchange interactions to the first and second nearest‐neighbours, the relation (J1/kB)2 + 2(J2/kB)2 = = (149±7) °K2 is obtained from the second moment of these energy distributions. A second relation between the two exchange parameters is obtained from a computation of the Néel temperature in the Green's function approximation. From the two relations J1/kB = = (8 ± 0.8) °K and J2/kB = (−6.5 ± 0.6) °K are derived. Taking properly into account a temperature‐independent contribution to the susceptibility, no experimental indication is found that there are other significant exchange interactions.

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