Studying ferromagnetism in PrNiGe2 through the magnetocaloric effect

J. L. Snyman; A. M. Strydom

doi:10.1063/1.4798235

Studying ferromagnetism in PrNiGe₂ through the magnetocaloric effect

J. L. Snyman, A. M. Strydom

Physics

University of Johannesburg

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

4 Citations (Scopus)

Abstract

PrNiGe₂ crystallizes in the orthorhombic CeNiSi₂-type crystal structure and is known to order ferromagnetically below 13 K. The emergence of ferromagnetic order has been understood in terms of a crystalline electric field (CEF) Hamiltonian dominated by O 0 n-Stevens operator equivalents. However, a recent calculation points out that the O 2 2-terms are important in this system. Here a study of the magnetocaloric effect (MCE) of PrNiGe₂ is presented. The aim of the study is to investigate the origin of long range ferromagnetic order given the presence of the above-mentioned CEF. We find that the interplay between a dominant CEF-energy scale and a weaker exchange interaction results in the formation of a ferromagnetic ground state in this system.

Original language	English
Article number	17E135
Journal	Journal of Applied Physics
Volume	113
Issue number	17
DOIs	https://doi.org/10.1063/1.4798235
Publication status	Published - 7 May 2013

ASJC Scopus subject areas

General Physics and Astronomy

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abstract = "PrNiGe2 crystallizes in the orthorhombic CeNiSi2-type crystal structure and is known to order ferromagnetically below 13 K. The emergence of ferromagnetic order has been understood in terms of a crystalline electric field (CEF) Hamiltonian dominated by O 0 n-Stevens operator equivalents. However, a recent calculation points out that the O 2 2-terms are important in this system. Here a study of the magnetocaloric effect (MCE) of PrNiGe2 is presented. The aim of the study is to investigate the origin of long range ferromagnetic order given the presence of the above-mentioned CEF. We find that the interplay between a dominant CEF-energy scale and a weaker exchange interaction results in the formation of a ferromagnetic ground state in this system.",

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N2 - PrNiGe2 crystallizes in the orthorhombic CeNiSi2-type crystal structure and is known to order ferromagnetically below 13 K. The emergence of ferromagnetic order has been understood in terms of a crystalline electric field (CEF) Hamiltonian dominated by O 0 n-Stevens operator equivalents. However, a recent calculation points out that the O 2 2-terms are important in this system. Here a study of the magnetocaloric effect (MCE) of PrNiGe2 is presented. The aim of the study is to investigate the origin of long range ferromagnetic order given the presence of the above-mentioned CEF. We find that the interplay between a dominant CEF-energy scale and a weaker exchange interaction results in the formation of a ferromagnetic ground state in this system.

AB - PrNiGe2 crystallizes in the orthorhombic CeNiSi2-type crystal structure and is known to order ferromagnetically below 13 K. The emergence of ferromagnetic order has been understood in terms of a crystalline electric field (CEF) Hamiltonian dominated by O 0 n-Stevens operator equivalents. However, a recent calculation points out that the O 2 2-terms are important in this system. Here a study of the magnetocaloric effect (MCE) of PrNiGe2 is presented. The aim of the study is to investigate the origin of long range ferromagnetic order given the presence of the above-mentioned CEF. We find that the interplay between a dominant CEF-energy scale and a weaker exchange interaction results in the formation of a ferromagnetic ground state in this system.

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Studying ferromagnetism in PrNiGe₂ through the magnetocaloric effect

Abstract

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