Effect of iron substitution on the high-temperature properties of Sm(Co, Cu, Ti)z permanent magnets

Jian Zhou; Ralph Skomski; David J. Sellmyer; Wei Tang; George C. Hadjipanayis

Effect of iron substitution on the high-temperature properties of Sm(Co, Cu, Ti)_z permanent magnets

Jian Zhou, Ralph Skomski, David J. Sellmyer, Wei Tang, George C. Hadjipanayis

Physics and Astronomy

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

Abstract

Recently, Ti-substituted Sm-Co permanent magnets have attracted renewed attention due to their interesting high-temperature coercivity. Our presentation deals with the effect of iron substitutions on the magnetic properties of the materials. X-ray diffraction shows that the investigated Sm(Co, Fe, Cu, Ti)_z materials (z = 7.0 - 7.6) are two-phase magnets, consisting of 1:5 and 2:17 regions. The iron content affects both the coercivity and the magnetization. Depending on composition and heat treatment, some samples show a positive temperature coefficient of the coercivity in the temperature range from 22°C to 550°C. Moderate amounts of iron enhance the room-temperature coercivity. For example, the room-temperature coercivity of Sm(Co_6.0Fe_0.4Cu_0.6Ti_0.3) is 9.6 kOe, as compared to 7.6 kOe for Sm(Co_6.4Cu_0.6Ti_0.3). At high temperatures, the addition of Fe has a deteriorating effect on the coercivity, which is as high as 10.0 kOe at 500°C for Sm(Co_6.4Cu_0.6Ti_0.3). The room-temperature magnetization increases on iron substitution, from 73 emu/g for Sm(Co_6.4Cu_0.6Ti_0.3) to 78 emu/g for Sm(Co_6.0Fe_0.4Cu_0.6Ti_0.3). The observed temperature dependence is ascribed to the preferential dumbbell-site occupancy of the Fe atoms.

Original language	English (US)
Pages (from-to)	U2.3.1-U2.3.6
Journal	Materials Research Society Symposium - Proceedings
Volume	674
State	Published - 2001
Event	Applications of Ferromagnetic and Optical Materials, Storage and Magnotoelectronics - San Francisco, CA, United States Duration: Apr 16 2001 → Apr 20 2001

ASJC Scopus subject areas

General Materials Science
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering

Cite this

@article{b35ec231971640fab292d9e869464a3b,

title = "Effect of iron substitution on the high-temperature properties of Sm(Co, Cu, Ti)z permanent magnets",

abstract = "Recently, Ti-substituted Sm-Co permanent magnets have attracted renewed attention due to their interesting high-temperature coercivity. Our presentation deals with the effect of iron substitutions on the magnetic properties of the materials. X-ray diffraction shows that the investigated Sm(Co, Fe, Cu, Ti)z materials (z = 7.0 - 7.6) are two-phase magnets, consisting of 1:5 and 2:17 regions. The iron content affects both the coercivity and the magnetization. Depending on composition and heat treatment, some samples show a positive temperature coefficient of the coercivity in the temperature range from 22°C to 550°C. Moderate amounts of iron enhance the room-temperature coercivity. For example, the room-temperature coercivity of Sm(Co6.0Fe0.4Cu0.6Ti0.3) is 9.6 kOe, as compared to 7.6 kOe for Sm(Co6.4Cu0.6Ti0.3). At high temperatures, the addition of Fe has a deteriorating effect on the coercivity, which is as high as 10.0 kOe at 500°C for Sm(Co6.4Cu0.6Ti0.3). The room-temperature magnetization increases on iron substitution, from 73 emu/g for Sm(Co6.4Cu0.6Ti0.3) to 78 emu/g for Sm(Co6.0Fe0.4Cu0.6Ti0.3). The observed temperature dependence is ascribed to the preferential dumbbell-site occupancy of the Fe atoms.",

author = "Jian Zhou and Ralph Skomski and Sellmyer, {David J.} and Wei Tang and Hadjipanayis, {George C.}",

year = "2001",

language = "English (US)",

volume = "674",

pages = "U2.3.1--U2.3.6",

journal = "Materials Research Society Symposium - Proceedings",

issn = "0272-9172",

publisher = "Materials Research Society",

note = "Applications of Ferromagnetic and Optical Materials, Storage and Magnotoelectronics ; Conference date: 16-04-2001 Through 20-04-2001",

}

TY - JOUR

T1 - Effect of iron substitution on the high-temperature properties of Sm(Co, Cu, Ti)z permanent magnets

AU - Zhou, Jian

AU - Skomski, Ralph

AU - Sellmyer, David J.

AU - Tang, Wei

AU - Hadjipanayis, George C.

PY - 2001

Y1 - 2001

N2 - Recently, Ti-substituted Sm-Co permanent magnets have attracted renewed attention due to their interesting high-temperature coercivity. Our presentation deals with the effect of iron substitutions on the magnetic properties of the materials. X-ray diffraction shows that the investigated Sm(Co, Fe, Cu, Ti)z materials (z = 7.0 - 7.6) are two-phase magnets, consisting of 1:5 and 2:17 regions. The iron content affects both the coercivity and the magnetization. Depending on composition and heat treatment, some samples show a positive temperature coefficient of the coercivity in the temperature range from 22°C to 550°C. Moderate amounts of iron enhance the room-temperature coercivity. For example, the room-temperature coercivity of Sm(Co6.0Fe0.4Cu0.6Ti0.3) is 9.6 kOe, as compared to 7.6 kOe for Sm(Co6.4Cu0.6Ti0.3). At high temperatures, the addition of Fe has a deteriorating effect on the coercivity, which is as high as 10.0 kOe at 500°C for Sm(Co6.4Cu0.6Ti0.3). The room-temperature magnetization increases on iron substitution, from 73 emu/g for Sm(Co6.4Cu0.6Ti0.3) to 78 emu/g for Sm(Co6.0Fe0.4Cu0.6Ti0.3). The observed temperature dependence is ascribed to the preferential dumbbell-site occupancy of the Fe atoms.

AB - Recently, Ti-substituted Sm-Co permanent magnets have attracted renewed attention due to their interesting high-temperature coercivity. Our presentation deals with the effect of iron substitutions on the magnetic properties of the materials. X-ray diffraction shows that the investigated Sm(Co, Fe, Cu, Ti)z materials (z = 7.0 - 7.6) are two-phase magnets, consisting of 1:5 and 2:17 regions. The iron content affects both the coercivity and the magnetization. Depending on composition and heat treatment, some samples show a positive temperature coefficient of the coercivity in the temperature range from 22°C to 550°C. Moderate amounts of iron enhance the room-temperature coercivity. For example, the room-temperature coercivity of Sm(Co6.0Fe0.4Cu0.6Ti0.3) is 9.6 kOe, as compared to 7.6 kOe for Sm(Co6.4Cu0.6Ti0.3). At high temperatures, the addition of Fe has a deteriorating effect on the coercivity, which is as high as 10.0 kOe at 500°C for Sm(Co6.4Cu0.6Ti0.3). The room-temperature magnetization increases on iron substitution, from 73 emu/g for Sm(Co6.4Cu0.6Ti0.3) to 78 emu/g for Sm(Co6.0Fe0.4Cu0.6Ti0.3). The observed temperature dependence is ascribed to the preferential dumbbell-site occupancy of the Fe atoms.

UR - http://www.scopus.com/inward/record.url?scp=0035560012&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0035560012&partnerID=8YFLogxK

M3 - Conference article

AN - SCOPUS:0035560012

SN - 0272-9172

VL - 674

SP - U2.3.1-U2.3.6

JO - Materials Research Society Symposium - Proceedings

JF - Materials Research Society Symposium - Proceedings

T2 - Applications of Ferromagnetic and Optical Materials, Storage and Magnotoelectronics

Y2 - 16 April 2001 through 20 April 2001

ER -

Effect of iron substitution on the high-temperature properties of Sm(Co, Cu, Ti)_z permanent magnets

Abstract

ASJC Scopus subject areas

Other files and links

Fingerprint

Cite this