Spin correlations in (Mn,Fe)2(P,Si) magnetocaloric compounds above Curie temperature

Xue-fei Miao; Luana Caron; Paul Gubbens; A Yaouanc; P Dalmas de Réotier; H. Luetkens; A Amato; Niels van Dijk; Ekkes Brück

doi:10.1016/j.jsamd.2016.06.002

Spin correlations in (Mn,Fe)2(P,Si) magnetocaloric compounds above Curie temperature

Xue-fei Miao, Luana Caron, Paul Gubbens, A Yaouanc, P Dalmas de Réotier, H. Luetkens, A Amato, Niels van Dijk, Ekkes Brück

RST/Fundamental Aspects of Materials and Energy

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Abstract

The longitudinal-field muon-spin relaxation (LF-μSR) technique was employed to study the spin correlations in (Mn,Fe)2(P,Si) compounds above the ferromagnetic transition temperature (TC). The (Mn,Fe)2(P,Si) compound under study is found to show itinerant magnetism. The standard deviation of the magnetic field distribution of electronic origin increases with a decrease in temperature, which is attributed to the development of spin correlations. The anomalously low magnetic fluctuation rate is suggested to be another signature of the spin correlations. The development of pronounced magnetic fluctuations is in agreement with the observed deviation of the paramagnetic susceptibility from Curie–Weiss behavior. Our study sheds light on the magneto-elastic transition and the mixed magnetism in (Mn,Fe)2(P,Si) compounds.

Original language	English
Pages (from-to)	147-151
Journal	Journal of Science: Advanced Materials and Devices
Volume	1
Issue number	2
DOIs	https://doi.org/10.1016/j.jsamd.2016.06.002
Publication status	Published - 21 Jun 2016

Keywords

Magnetocaloric effect
Spin correlations
Muon-spin relaxation
Spin dynamics

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10.1016/j.jsamd.2016.06.002

miao 02032017Final published version, 681 KBLicence: CC BY

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title = "Spin correlations in (Mn,Fe)2(P,Si) magnetocaloric compounds above Curie temperature",

abstract = "The longitudinal-field muon-spin relaxation (LF-μSR) technique was employed to study the spin correlations in (Mn,Fe)2(P,Si) compounds above the ferromagnetic transition temperature (TC). The (Mn,Fe)2(P,Si) compound under study is found to show itinerant magnetism. The standard deviation of the magnetic field distribution of electronic origin increases with a decrease in temperature, which is attributed to the development of spin correlations. The anomalously low magnetic fluctuation rate is suggested to be another signature of the spin correlations. The development of pronounced magnetic fluctuations is in agreement with the observed deviation of the paramagnetic susceptibility from Curie–Weiss behavior. Our study sheds light on the magneto-elastic transition and the mixed magnetism in (Mn,Fe)2(P,Si) compounds.",

keywords = "Magnetocaloric effect, Spin correlations, Muon-spin relaxation, Spin dynamics",

author = "Xue-fei Miao and Luana Caron and Paul Gubbens and A Yaouanc and {Dalmas de R{\'e}otier}, P and H. Luetkens and A Amato and {van Dijk}, Niels and Ekkes Br{\"u}ck",

year = "2016",

month = jun,

day = "21",

doi = "10.1016/j.jsamd.2016.06.002",

language = "English",

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journal = "Journal of Science: Advanced Materials and Devices",

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TY - JOUR

T1 - Spin correlations in (Mn,Fe)2(P,Si) magnetocaloric compounds above Curie temperature

AU - Miao, Xue-fei

AU - Caron, Luana

AU - Gubbens, Paul

AU - Yaouanc, A

AU - Dalmas de Réotier, P

AU - Luetkens, H.

AU - Amato, A

AU - van Dijk, Niels

AU - Brück, Ekkes

PY - 2016/6/21

Y1 - 2016/6/21

N2 - The longitudinal-field muon-spin relaxation (LF-μSR) technique was employed to study the spin correlations in (Mn,Fe)2(P,Si) compounds above the ferromagnetic transition temperature (TC). The (Mn,Fe)2(P,Si) compound under study is found to show itinerant magnetism. The standard deviation of the magnetic field distribution of electronic origin increases with a decrease in temperature, which is attributed to the development of spin correlations. The anomalously low magnetic fluctuation rate is suggested to be another signature of the spin correlations. The development of pronounced magnetic fluctuations is in agreement with the observed deviation of the paramagnetic susceptibility from Curie–Weiss behavior. Our study sheds light on the magneto-elastic transition and the mixed magnetism in (Mn,Fe)2(P,Si) compounds.

AB - The longitudinal-field muon-spin relaxation (LF-μSR) technique was employed to study the spin correlations in (Mn,Fe)2(P,Si) compounds above the ferromagnetic transition temperature (TC). The (Mn,Fe)2(P,Si) compound under study is found to show itinerant magnetism. The standard deviation of the magnetic field distribution of electronic origin increases with a decrease in temperature, which is attributed to the development of spin correlations. The anomalously low magnetic fluctuation rate is suggested to be another signature of the spin correlations. The development of pronounced magnetic fluctuations is in agreement with the observed deviation of the paramagnetic susceptibility from Curie–Weiss behavior. Our study sheds light on the magneto-elastic transition and the mixed magnetism in (Mn,Fe)2(P,Si) compounds.

KW - Magnetocaloric effect

KW - Spin correlations

KW - Muon-spin relaxation

KW - Spin dynamics

UR - http://resolver.tudelft.nl/uuid:a30a45ca-4c73-4417-8057-63ae103163b0

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DO - 10.1016/j.jsamd.2016.06.002

M3 - Article

SN - 2468-2179

VL - 1

SP - 147

EP - 151

JO - Journal of Science: Advanced Materials and Devices

JF - Journal of Science: Advanced Materials and Devices

IS - 2

ER -

Spin correlations in (Mn,Fe)2(P,Si) magnetocaloric compounds above Curie temperature

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Keywords

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