155Gd Mössbauer effect and magnetic properties of novel RT2B2C compounds with TNi, Co

F. M. Mulder; J.H.V.J. Brabers; R. Coehoorn; R. C. Thiel; K.H.J. Buschow; F. R. de Boer

doi:10.1016/0925-8388(94)01312-6

155Gd Mössbauer effect and magnetic properties of novel RT2B2C compounds with TNi, Co

F. M. Mulder, J.H.V.J. Brabers, R. Coehoorn, R. C. Thiel, K.H.J. Buschow, F. R. de Boer

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

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Abstract

We have prepared the compounds GdNi₂B₂C and GdCo₂B₂C and investigated their magnetic properties by means of ¹⁵⁵Gd Mössbauer spectroscopy. From the temperature dependence of the hyperfine field, we derived that these two compounds give rise to magnetic ordering at 5.5±0.5 K and 21±1 K respectively. Large values of the electric field gradient V_zz were found, reminiscent of compounds of the related ThCr₂Si₂ type. A quantitative explanation of the origin of these field gradients is presented by ab initio band structure calculations. The experimental values of V_zz have been used to estimate values for the second-order crystal field parameter in GdNi₂B₂C (A₂ ⁰=-428Ka₀ ^-2) and GdCo₂B₂C (A₂ ⁰=-346Ka₀ ^-2).

Original language	English
Pages (from-to)	118-122
Number of pages	5
Journal	Journal of Alloys and Compounds
Volume	217
Issue number	1
DOIs	https://doi.org/10.1016/0925-8388(94)01312-6
Publication status	Published - 15 Jan 1995
Externally published	Yes

Funding

The authors acknowledge the stimulating support of L.J. de Jongh. This work is part of the "Stiehtung voor Fundamenteel Onderzoek der Materie" (FOM) which is financially supported by the NWO.

Keywords

Band structure calculations
Crystal field
Electric field gradient
Magnetic properties
Mössbauer effect

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title = "155Gd M{\"o}ssbauer effect and magnetic properties of novel RT2B2C compounds with TNi, Co",

abstract = "We have prepared the compounds GdNi2B2C and GdCo2B2C and investigated their magnetic properties by means of 155Gd M{\"o}ssbauer spectroscopy. From the temperature dependence of the hyperfine field, we derived that these two compounds give rise to magnetic ordering at 5.5±0.5 K and 21±1 K respectively. Large values of the electric field gradient Vzz were found, reminiscent of compounds of the related ThCr2Si2 type. A quantitative explanation of the origin of these field gradients is presented by ab initio band structure calculations. The experimental values of Vzz have been used to estimate values for the second-order crystal field parameter in GdNi2B2C (A2 0=-428Ka0 -2) and GdCo2B2C (A2 0=-346Ka0 -2).",

keywords = "Band structure calculations, Crystal field, Electric field gradient, Magnetic properties, M{\"o}ssbauer effect",

author = "Mulder, {F. M.} and J.H.V.J. Brabers and R. Coehoorn and Thiel, {R. C.} and K.H.J. Buschow and {de Boer}, {F. R.}",

year = "1995",

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doi = "10.1016/0925-8388(94)01312-6",

language = "English",

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T1 - 155Gd Mössbauer effect and magnetic properties of novel RT2B2C compounds with TNi, Co

AU - Mulder, F. M.

AU - Brabers, J.H.V.J.

AU - Coehoorn, R.

AU - Thiel, R. C.

AU - Buschow, K.H.J.

AU - de Boer, F. R.

PY - 1995/1/15

Y1 - 1995/1/15

N2 - We have prepared the compounds GdNi2B2C and GdCo2B2C and investigated their magnetic properties by means of 155Gd Mössbauer spectroscopy. From the temperature dependence of the hyperfine field, we derived that these two compounds give rise to magnetic ordering at 5.5±0.5 K and 21±1 K respectively. Large values of the electric field gradient Vzz were found, reminiscent of compounds of the related ThCr2Si2 type. A quantitative explanation of the origin of these field gradients is presented by ab initio band structure calculations. The experimental values of Vzz have been used to estimate values for the second-order crystal field parameter in GdNi2B2C (A2 0=-428Ka0 -2) and GdCo2B2C (A2 0=-346Ka0 -2).

AB - We have prepared the compounds GdNi2B2C and GdCo2B2C and investigated their magnetic properties by means of 155Gd Mössbauer spectroscopy. From the temperature dependence of the hyperfine field, we derived that these two compounds give rise to magnetic ordering at 5.5±0.5 K and 21±1 K respectively. Large values of the electric field gradient Vzz were found, reminiscent of compounds of the related ThCr2Si2 type. A quantitative explanation of the origin of these field gradients is presented by ab initio band structure calculations. The experimental values of Vzz have been used to estimate values for the second-order crystal field parameter in GdNi2B2C (A2 0=-428Ka0 -2) and GdCo2B2C (A2 0=-346Ka0 -2).

KW - Band structure calculations

KW - Crystal field

KW - Electric field gradient

KW - Magnetic properties

KW - Mössbauer effect

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U2 - 10.1016/0925-8388(94)01312-6

DO - 10.1016/0925-8388(94)01312-6

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AN - SCOPUS:0029184551

SN - 0925-8388

VL - 217

SP - 118

EP - 122

JO - Journal of Alloys and Compounds

JF - Journal of Alloys and Compounds

IS - 1

ER -

155Gd Mössbauer effect and magnetic properties of novel RT2B2C compounds with TNi, Co

Abstract

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Keywords

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