Magnetic properties of natural chalcopyrite at low temperature

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Abstract

Magnetic susceptibilities of natural chalcopyrite from Cu ore deposits in Oman have been measured at temperatures between 77 and 450 K and magnetic field strengths between 6 and 9 kOe. The results show typical antiferromagnetism from 450 down to 190 K, where a magnetic phase transition is observed. Below the transition temperature, spontaneous magnetizations deduced from magnetic susceptibilities versus fields are extrapolated to 0 K to give a weak saturation magnetization of 0.015±0.001 emu g-1. This value could be explained by Cu moments having a paramagnetic arrangement down to 190 K and then ordering magnetically at lower temperatures.

Original languageEnglish
Pages (from-to)349-353
Number of pages5
JournalMaterials Letters
Volume46
Issue number6
DOIs
Publication statusPublished - Dec 2000

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Magnetic susceptibility
Magnetic properties
Oman
magnetic properties
magnetic permeability
Antiferromagnetism
Ore deposits
magnetization
antiferromagnetism
Saturation magnetization
Superconducting transition temperature
Magnetization
field strength
Phase transitions
transition temperature
deposits
minerals
Magnetic fields
moments
saturation

ASJC Scopus subject areas

  • Materials Science(all)

Cite this

Magnetic properties of natural chalcopyrite at low temperature. / Rais, A.; Gismelseed, A. M.; Al-Rawas, A. D.

In: Materials Letters, Vol. 46, No. 6, 12.2000, p. 349-353.

Research output: Contribution to journalArticle

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AB - Magnetic susceptibilities of natural chalcopyrite from Cu ore deposits in Oman have been measured at temperatures between 77 and 450 K and magnetic field strengths between 6 and 9 kOe. The results show typical antiferromagnetism from 450 down to 190 K, where a magnetic phase transition is observed. Below the transition temperature, spontaneous magnetizations deduced from magnetic susceptibilities versus fields are extrapolated to 0 K to give a weak saturation magnetization of 0.015±0.001 emu g-1. This value could be explained by Cu moments having a paramagnetic arrangement down to 190 K and then ordering magnetically at lower temperatures.

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