Low-field magnetic properties and magnetocaloric effect in annealed and as-cast Dy(Co1-xSix)2 compounds

Wang Yu; Yang Sen; Song Xiaoping

doi:10.1016/S0925-8388(03)00023-9

Low-field magnetic properties and magnetocaloric effect in annealed and as-cast Dy(Co_1-xSi_x)₂ compounds

Wang Yu
, Yang Sen
, Song Xiaoping

School of Physics

Xi'an Jiaotong University

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

11 Scopus citations

Abstract

Structure and magnetic properties of as-cast and annealed Dy(Co_1-xSi_x)₂ samples with x=0, 0.02, 0.04, 0.06, 0.08 were investigated using a scanning electron microscope (SEM) equipped with energy-dispersive X-ray analyser (EDX), optical microscopy and a vibrating sample magnetometer (VSM). The results show that most of the samples consist of MgCu₂-type DyCo₂ and that some DyCo₃ (PuNi₃ structure) may be present as minority phase. The first-order transition disappeared after partial substitution of Si for Co in the Dy(Co_1-xSi_x)₂ (x>0.06) alloys. The annealed compounds have a rather large magnetic entropy change near T_c. The magnetization of the arc-melted compounds changes gradually in the vicinity of T_c which leads to relatively small magnetic entropy changes ΔS_M. However, the temperature range of ΔS_M is wider for these compounds and this may practically be more useful.

Original language	English
Pages (from-to)	81-84
Number of pages	4
Journal	Journal of Alloys and Compounds
Volume	354
Issue number	1-2
DOIs	https://doi.org/10.1016/S0925-8388(03)00023-9
State	Published - 12 May 2003

Keywords

Magnetic measurements
Magnetically ordered materials
Magnetocaloric
Rare earth compounds
Transition metal compounds

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10.1016/S0925-8388(03)00023-9

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title = "Low-field magnetic properties and magnetocaloric effect in annealed and as-cast Dy(Co1-xSix)2 compounds",

abstract = "Structure and magnetic properties of as-cast and annealed Dy(Co1-xSix)2 samples with x=0, 0.02, 0.04, 0.06, 0.08 were investigated using a scanning electron microscope (SEM) equipped with energy-dispersive X-ray analyser (EDX), optical microscopy and a vibrating sample magnetometer (VSM). The results show that most of the samples consist of MgCu2-type DyCo2 and that some DyCo3 (PuNi3 structure) may be present as minority phase. The first-order transition disappeared after partial substitution of Si for Co in the Dy(Co1-xSix)2 (x>0.06) alloys. The annealed compounds have a rather large magnetic entropy change near Tc. The magnetization of the arc-melted compounds changes gradually in the vicinity of Tc which leads to relatively small magnetic entropy changes ΔSM. However, the temperature range of ΔSM is wider for these compounds and this may practically be more useful.",

keywords = "Magnetic measurements, Magnetically ordered materials, Magnetocaloric, Rare earth compounds, Transition metal compounds",

author = "Wang Yu and Yang Sen and Song Xiaoping",

year = "2003",

month = may,

day = "12",

doi = "10.1016/S0925-8388(03)00023-9",

language = "英语",

volume = "354",

pages = "81--84",

journal = "Journal of Alloys and Compounds",

issn = "0925-8388",

publisher = "Elsevier B.V.",

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TY - JOUR

T1 - Low-field magnetic properties and magnetocaloric effect in annealed and as-cast Dy(Co1-xSix)2 compounds

AU - Yu, Wang

AU - Sen, Yang

AU - Xiaoping, Song

PY - 2003/5/12

Y1 - 2003/5/12

N2 - Structure and magnetic properties of as-cast and annealed Dy(Co1-xSix)2 samples with x=0, 0.02, 0.04, 0.06, 0.08 were investigated using a scanning electron microscope (SEM) equipped with energy-dispersive X-ray analyser (EDX), optical microscopy and a vibrating sample magnetometer (VSM). The results show that most of the samples consist of MgCu2-type DyCo2 and that some DyCo3 (PuNi3 structure) may be present as minority phase. The first-order transition disappeared after partial substitution of Si for Co in the Dy(Co1-xSix)2 (x>0.06) alloys. The annealed compounds have a rather large magnetic entropy change near Tc. The magnetization of the arc-melted compounds changes gradually in the vicinity of Tc which leads to relatively small magnetic entropy changes ΔSM. However, the temperature range of ΔSM is wider for these compounds and this may practically be more useful.

AB - Structure and magnetic properties of as-cast and annealed Dy(Co1-xSix)2 samples with x=0, 0.02, 0.04, 0.06, 0.08 were investigated using a scanning electron microscope (SEM) equipped with energy-dispersive X-ray analyser (EDX), optical microscopy and a vibrating sample magnetometer (VSM). The results show that most of the samples consist of MgCu2-type DyCo2 and that some DyCo3 (PuNi3 structure) may be present as minority phase. The first-order transition disappeared after partial substitution of Si for Co in the Dy(Co1-xSix)2 (x>0.06) alloys. The annealed compounds have a rather large magnetic entropy change near Tc. The magnetization of the arc-melted compounds changes gradually in the vicinity of Tc which leads to relatively small magnetic entropy changes ΔSM. However, the temperature range of ΔSM is wider for these compounds and this may practically be more useful.

KW - Magnetic measurements

KW - Magnetically ordered materials

KW - Magnetocaloric

KW - Rare earth compounds

KW - Transition metal compounds

UR - https://www.scopus.com/pages/publications/0038709575

U2 - 10.1016/S0925-8388(03)00023-9

DO - 10.1016/S0925-8388(03)00023-9

M3 - 文章

AN - SCOPUS:0038709575

SN - 0925-8388

VL - 354

SP - 81

EP - 84

JO - Journal of Alloys and Compounds

JF - Journal of Alloys and Compounds

IS - 1-2

ER -

Low-field magnetic properties and magnetocaloric effect in annealed and as-cast Dy(Co_1-xSi_x)₂ compounds

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Keywords

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