Magneto-crystalline anisotropy in R2PdSi3 (R=Tb, Dy, Ho, Er, Tm) single crystals

M. Frontzek; A. Kreyssig; M. Doerr; M. Rotter; G. Behr; W. Löser; I. Mazilu; M. Loewenhaupt

doi:10.1016/j.jmmm.2005.07.016

Magneto-crystalline anisotropy in R₂PdSi₃ (R=Tb, Dy, Ho, Er, Tm) single crystals

M. Frontzek, A. Kreyssig, M. Doerr, M. Rotter, G. Behr, W. Löser, I. Mazilu, M. Loewenhaupt

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

35 Scopus citations

Abstract

We present single crystal AC-susceptibility and magnetisation measurements of R₂PdSi₃ compounds with R=Tb, Dy, Ho, Er, and Tm. The crystal-electric field (CEF) parameter B₂⁰ and the value of the two-ion interaction exchange integral J ( Q = 0 ) are evaluated from the anisotropy of the AC-susceptibility measurements in the paramagnetic state. In addition, the magnetic anisotropy is investigated by magnetisation measurements well below the magnetic ordering temperature. Our results yield the first parameter in the CEF Hamiltonian B₂⁰ / ( α 〈 r² 〉 ) to be around -40 meV/Å² for R₂PdSi₃. The influence of higher order terms in the CEF Hamiltonian results in a crossing of magnetic hard and easy directions in the paramagnetic state for Dy₂PdSi₃ and Ho₂PdSi₃. The anisotropy due to the CEF is conserved in the ordered state. The observed magnetic properties turn out to be complex due to the delicate interplay of CEF effects and magnetic two-ion interactions.

Original language	English
Pages (from-to)	398-406
Number of pages	9
Journal	Journal of Magnetism and Magnetic Materials
Volume	301
Issue number	2
DOIs	https://doi.org/10.1016/j.jmmm.2005.07.016
State	Published - Jun 2006
Externally published	Yes

Funding

We gratefully acknowledge the support of the Deutsche Forschungsgemeinschaft within the scope of the SFB 463.

Funders	Funder number
Deutsche Forschungsgemeinschaft

Keywords

Crystal-electric-field effects
RPdSi
Rare earth magnetism

Access to Document

10.1016/j.jmmm.2005.07.016

Cite this

@article{71a5e405abaf417b81feeec83a8b81f4,

title = "Magneto-crystalline anisotropy in R2PdSi3 (R=Tb, Dy, Ho, Er, Tm) single crystals",

abstract = "We present single crystal AC-susceptibility and magnetisation measurements of R2PdSi3 compounds with R=Tb, Dy, Ho, Er, and Tm. The crystal-electric field (CEF) parameter B20 and the value of the two-ion interaction exchange integral J ( Q = 0 ) are evaluated from the anisotropy of the AC-susceptibility measurements in the paramagnetic state. In addition, the magnetic anisotropy is investigated by magnetisation measurements well below the magnetic ordering temperature. Our results yield the first parameter in the CEF Hamiltonian B20 / ( α 〈 r2 〉 ) to be around -40 meV/{\AA}2 for R2PdSi3. The influence of higher order terms in the CEF Hamiltonian results in a crossing of magnetic hard and easy directions in the paramagnetic state for Dy2PdSi3 and Ho2PdSi3. The anisotropy due to the CEF is conserved in the ordered state. The observed magnetic properties turn out to be complex due to the delicate interplay of CEF effects and magnetic two-ion interactions.",

keywords = "Crystal-electric-field effects, RPdSi, Rare earth magnetism",

author = "M. Frontzek and A. Kreyssig and M. Doerr and M. Rotter and G. Behr and W. L{\"o}ser and I. Mazilu and M. Loewenhaupt",

year = "2006",

month = jun,

doi = "10.1016/j.jmmm.2005.07.016",

language = "English",

volume = "301",

pages = "398--406",

journal = "Journal of Magnetism and Magnetic Materials",

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T1 - Magneto-crystalline anisotropy in R2PdSi3 (R=Tb, Dy, Ho, Er, Tm) single crystals

AU - Frontzek, M.

AU - Kreyssig, A.

AU - Doerr, M.

AU - Rotter, M.

AU - Behr, G.

AU - Löser, W.

AU - Mazilu, I.

AU - Loewenhaupt, M.

PY - 2006/6

Y1 - 2006/6

N2 - We present single crystal AC-susceptibility and magnetisation measurements of R2PdSi3 compounds with R=Tb, Dy, Ho, Er, and Tm. The crystal-electric field (CEF) parameter B20 and the value of the two-ion interaction exchange integral J ( Q = 0 ) are evaluated from the anisotropy of the AC-susceptibility measurements in the paramagnetic state. In addition, the magnetic anisotropy is investigated by magnetisation measurements well below the magnetic ordering temperature. Our results yield the first parameter in the CEF Hamiltonian B20 / ( α 〈 r2 〉 ) to be around -40 meV/Å2 for R2PdSi3. The influence of higher order terms in the CEF Hamiltonian results in a crossing of magnetic hard and easy directions in the paramagnetic state for Dy2PdSi3 and Ho2PdSi3. The anisotropy due to the CEF is conserved in the ordered state. The observed magnetic properties turn out to be complex due to the delicate interplay of CEF effects and magnetic two-ion interactions.

AB - We present single crystal AC-susceptibility and magnetisation measurements of R2PdSi3 compounds with R=Tb, Dy, Ho, Er, and Tm. The crystal-electric field (CEF) parameter B20 and the value of the two-ion interaction exchange integral J ( Q = 0 ) are evaluated from the anisotropy of the AC-susceptibility measurements in the paramagnetic state. In addition, the magnetic anisotropy is investigated by magnetisation measurements well below the magnetic ordering temperature. Our results yield the first parameter in the CEF Hamiltonian B20 / ( α 〈 r2 〉 ) to be around -40 meV/Å2 for R2PdSi3. The influence of higher order terms in the CEF Hamiltonian results in a crossing of magnetic hard and easy directions in the paramagnetic state for Dy2PdSi3 and Ho2PdSi3. The anisotropy due to the CEF is conserved in the ordered state. The observed magnetic properties turn out to be complex due to the delicate interplay of CEF effects and magnetic two-ion interactions.

KW - Crystal-electric-field effects

KW - RPdSi

KW - Rare earth magnetism

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