Effect of Fe, Cu, Zr, and Ti on the magnetic properties of SmCo-1: 7 magnets

M. Venkatesan; F. M.F. Rhen; R. Gunning; J. M.D. Coey

doi:10.1109/TMAG.2002.803235

Effect of Fe, Cu, Zr, and Ti on the magnetic properties of SmCo-1: 7 magnets

M. Venkatesan, F. M.F. Rhen, R. Gunning, J. M.D. Coey

Department of Physics

Trinity College Dublin

Research output: Contribution to journal › Conference article › peer-review

Abstract

The effect of Fe, Cu, Zr, and Ti substitution on magnetic properties of SmCo 1:7 magnets at temperatures up to 500 °C were studied. As-milled amorphous Sm(Co,Fe,Cu,Ti-Zr)₇ magnets crystallized in the TbCu₇-type structure after annealing at 750 °C for 2 h. A room-temperature intrinsic coercivity of around 2.5 T is obtained for compositions SmCo_6.4 Zr_0.2 Ti_0.4 and SmCo_6.4 Fe_0.1 Zr_0.1 Ti_0.4. The high coercivity of the ball-milled SmCo_7-x Ti_x magnets is attributed to the strong pinning of the walls of the "interaction domains" by the network of grain boundaries between the nanocrystalline grains. The virgin curve of the ball-milled samples is suggestive of strong domain wall pinning.

Original language	English
Pages (from-to)	2919-2921
Number of pages	3
Journal	IEEE Transactions on Magnetics
Volume	38
Issue number	5 I
DOIs	https://doi.org/10.1109/TMAG.2002.803235
Publication status	Published - Sep 2002
Event	2002 International Magnetics Conference (Intermag 2002) - Amsterdam, Netherlands Duration: 28 Apr 2002 → 2 May 2002

Keywords

Coercivity
Curie temperature
Magnetization
X-ray diffraction

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10.1109/TMAG.2002.803235

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title = "Effect of Fe, Cu, Zr, and Ti on the magnetic properties of SmCo-1: 7 magnets",

abstract = "The effect of Fe, Cu, Zr, and Ti substitution on magnetic properties of SmCo 1:7 magnets at temperatures up to 500 °C were studied. As-milled amorphous Sm(Co,Fe,Cu,Ti-Zr)7 magnets crystallized in the TbCu7-type structure after annealing at 750 °C for 2 h. A room-temperature intrinsic coercivity of around 2.5 T is obtained for compositions SmCo6.4 Zr0.2 Ti0.4 and SmCo6.4 Fe0.1 Zr0.1 Ti0.4. The high coercivity of the ball-milled SmCo7-x Tix magnets is attributed to the strong pinning of the walls of the {"}interaction domains{"} by the network of grain boundaries between the nanocrystalline grains. The virgin curve of the ball-milled samples is suggestive of strong domain wall pinning.",

keywords = "Coercivity, Curie temperature, Magnetization, X-ray diffraction",

author = "M. Venkatesan and Rhen, {F. M.F.} and R. Gunning and Coey, {J. M.D.}",

year = "2002",

month = sep,

doi = "10.1109/TMAG.2002.803235",

language = "English",

volume = "38",

pages = "2919--2921",

journal = "IEEE Transactions on Magnetics",

issn = "0018-9464",

number = "5 I",

note = "2002 International Magnetics Conference (Intermag 2002) ; Conference date: 28-04-2002 Through 02-05-2002",

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TY - JOUR

T1 - Effect of Fe, Cu, Zr, and Ti on the magnetic properties of SmCo-1

T2 - 2002 International Magnetics Conference (Intermag 2002)

AU - Venkatesan, M.

AU - Rhen, F. M.F.

AU - Gunning, R.

AU - Coey, J. M.D.

PY - 2002/9

Y1 - 2002/9

N2 - The effect of Fe, Cu, Zr, and Ti substitution on magnetic properties of SmCo 1:7 magnets at temperatures up to 500 °C were studied. As-milled amorphous Sm(Co,Fe,Cu,Ti-Zr)7 magnets crystallized in the TbCu7-type structure after annealing at 750 °C for 2 h. A room-temperature intrinsic coercivity of around 2.5 T is obtained for compositions SmCo6.4 Zr0.2 Ti0.4 and SmCo6.4 Fe0.1 Zr0.1 Ti0.4. The high coercivity of the ball-milled SmCo7-x Tix magnets is attributed to the strong pinning of the walls of the "interaction domains" by the network of grain boundaries between the nanocrystalline grains. The virgin curve of the ball-milled samples is suggestive of strong domain wall pinning.

AB - The effect of Fe, Cu, Zr, and Ti substitution on magnetic properties of SmCo 1:7 magnets at temperatures up to 500 °C were studied. As-milled amorphous Sm(Co,Fe,Cu,Ti-Zr)7 magnets crystallized in the TbCu7-type structure after annealing at 750 °C for 2 h. A room-temperature intrinsic coercivity of around 2.5 T is obtained for compositions SmCo6.4 Zr0.2 Ti0.4 and SmCo6.4 Fe0.1 Zr0.1 Ti0.4. The high coercivity of the ball-milled SmCo7-x Tix magnets is attributed to the strong pinning of the walls of the "interaction domains" by the network of grain boundaries between the nanocrystalline grains. The virgin curve of the ball-milled samples is suggestive of strong domain wall pinning.

KW - Coercivity

KW - Curie temperature

KW - Magnetization

KW - X-ray diffraction

UR - http://www.scopus.com/inward/record.url?scp=0036762346&partnerID=8YFLogxK

U2 - 10.1109/TMAG.2002.803235

DO - 10.1109/TMAG.2002.803235

M3 - Conference article

AN - SCOPUS:0036762346

SN - 0018-9464

VL - 38

SP - 2919

EP - 2921

JO - IEEE Transactions on Magnetics

JF - IEEE Transactions on Magnetics

IS - 5 I

Y2 - 28 April 2002 through 2 May 2002

ER -

Effect of Fe, Cu, Zr, and Ti on the magnetic properties of SmCo-1: 7 magnets

Abstract

Keywords

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