A study of the rapid change of the molecular moment in Ho(Co1-c Nic)2

A. Tari

doi:10.1063/1.330675

A study of the rapid change of the molecular moment in Ho(Co_1-c Ni_c)₂

A. Tari^*

^*Corresponding author for this work

King Fahd University of Petroleum & Minerals

Research output: Contribution to journal › Article › peer-review

2 Scopus citations

Abstract

The cobalt-rich end of the series Ho(Co_1-cNi_c) ₂ has been studied by spin-echo NMR of ¹⁶⁵Ho and by magnetization measurements. From the NMR data a value of (9.55±0.11) μ_B is estimated for holmium in HoCo₂. Magnetization measurements on the same compound give (7.9±0.1)μ_B for the molecular moment. An assumption of (0.8±0.2) μ_B for the average cobalt moment μ̄ leads to (9.5±0.4)μ_B for holmium in agreement with the value estimated from NMR data. Nickel substitution causes a rapid fall in the hyperfine field while the molecular moment shows a simultaneous increase with increasing nickel content. This is attributed to a bootstrap process involving the exchange field and the magnitude of the cobalt moment. This process appears to be more effective when the value of the cobalt moment is in the vicinity of 0.8μ_B.

Original language	English
Pages (from-to)	1941-1943
Number of pages	3
Journal	Journal of Applied Physics
Volume	53
Issue number	3
DOIs	https://doi.org/10.1063/1.330675
State	Published - 1982

ASJC Scopus subject areas

General Physics and Astronomy

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10.1063/1.330675

Cite this

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title = "A study of the rapid change of the molecular moment in Ho(Co1-c Nic)2",

abstract = "The cobalt-rich end of the series Ho(Co1-cNic) 2 has been studied by spin-echo NMR of 165Ho and by magnetization measurements. From the NMR data a value of (9.55±0.11) μB is estimated for holmium in HoCo2. Magnetization measurements on the same compound give (7.9±0.1)μB for the molecular moment. An assumption of (0.8±0.2) μB for the average cobalt moment {\=μ} leads to (9.5±0.4)μB for holmium in agreement with the value estimated from NMR data. Nickel substitution causes a rapid fall in the hyperfine field while the molecular moment shows a simultaneous increase with increasing nickel content. This is attributed to a bootstrap process involving the exchange field and the magnitude of the cobalt moment. This process appears to be more effective when the value of the cobalt moment is in the vicinity of 0.8μB.",

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T1 - A study of the rapid change of the molecular moment in Ho(Co1-c Nic)2

AU - Tari, A.

PY - 1982

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N2 - The cobalt-rich end of the series Ho(Co1-cNic) 2 has been studied by spin-echo NMR of 165Ho and by magnetization measurements. From the NMR data a value of (9.55±0.11) μB is estimated for holmium in HoCo2. Magnetization measurements on the same compound give (7.9±0.1)μB for the molecular moment. An assumption of (0.8±0.2) μB for the average cobalt moment μ̄ leads to (9.5±0.4)μB for holmium in agreement with the value estimated from NMR data. Nickel substitution causes a rapid fall in the hyperfine field while the molecular moment shows a simultaneous increase with increasing nickel content. This is attributed to a bootstrap process involving the exchange field and the magnitude of the cobalt moment. This process appears to be more effective when the value of the cobalt moment is in the vicinity of 0.8μB.

AB - The cobalt-rich end of the series Ho(Co1-cNic) 2 has been studied by spin-echo NMR of 165Ho and by magnetization measurements. From the NMR data a value of (9.55±0.11) μB is estimated for holmium in HoCo2. Magnetization measurements on the same compound give (7.9±0.1)μB for the molecular moment. An assumption of (0.8±0.2) μB for the average cobalt moment μ̄ leads to (9.5±0.4)μB for holmium in agreement with the value estimated from NMR data. Nickel substitution causes a rapid fall in the hyperfine field while the molecular moment shows a simultaneous increase with increasing nickel content. This is attributed to a bootstrap process involving the exchange field and the magnitude of the cobalt moment. This process appears to be more effective when the value of the cobalt moment is in the vicinity of 0.8μB.

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