Room-temperature magnetic Heusler compound Fe2Ti0.5Co0.5Si with semiconducting behavior

Yunlong Jin, Yi Yang, Shah Valloppilly, Sy-Hwang Liou, David J Sellmyer

Research output: Contribution to journalArticle

Abstract

The structural, magnetic and electron-transport properties of Fe2Ti0.5Co0.5Si are investigated. It is demonstrated that rapidly quenched Fe2Ti0.5Co0.5Si ribbons crystallize in the L21 structure, indicating a full Heusler compound, and exhibit ferromagnetism with a high Curie temperature of about 790 K. Moreover, Fe2Ti0.5Co0.5Si exhibits semiconducting behavior with a negative temperature coefficient of resistivity, a room-temperature resistivity of about 6.5 mΩ cm and a residual resistivity ρ0 of about 6.75 mΩ cm. The carrier concentration n is 1.15 × 1020 cm−3 at 5 K. The magnetic semiconducting behavior with a high Curie temperature makes this material promising for room-temperature spintronic and magnetic applications.

Original languageEnglish (US)
Pages (from-to)343-346
Number of pages4
JournalJournal of Magnetism and Magnetic Materials
Volume474
DOIs
StatePublished - Mar 15 2019

Fingerprint

Curie temperature
Negative temperature coefficient
Electron transport properties
Magnetoelectronics
electrical resistivity
Ferromagnetism
room temperature
Carrier concentration
Temperature
ferromagnetism
ribbons
transport properties
coefficients
electrons
temperature

Keywords

  • Heusler compound
  • High Curie temperature
  • Magnetic semiconducting behavior

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Cite this

Room-temperature magnetic Heusler compound Fe2Ti0.5Co0.5Si with semiconducting behavior. / Jin, Yunlong; Yang, Yi; Valloppilly, Shah; Liou, Sy-Hwang; Sellmyer, David J.

In: Journal of Magnetism and Magnetic Materials, Vol. 474, 15.03.2019, p. 343-346.

Research output: Contribution to journalArticle

@article{99674d2c6f65467da66521881f13fa84,
title = "Room-temperature magnetic Heusler compound Fe2Ti0.5Co0.5Si with semiconducting behavior",
abstract = "The structural, magnetic and electron-transport properties of Fe2Ti0.5Co0.5Si are investigated. It is demonstrated that rapidly quenched Fe2Ti0.5Co0.5Si ribbons crystallize in the L21 structure, indicating a full Heusler compound, and exhibit ferromagnetism with a high Curie temperature of about 790 K. Moreover, Fe2Ti0.5Co0.5Si exhibits semiconducting behavior with a negative temperature coefficient of resistivity, a room-temperature resistivity of about 6.5 mΩ cm and a residual resistivity ρ0 of about 6.75 mΩ cm. The carrier concentration n is 1.15 × 1020 cm−3 at 5 K. The magnetic semiconducting behavior with a high Curie temperature makes this material promising for room-temperature spintronic and magnetic applications.",
keywords = "Heusler compound, High Curie temperature, Magnetic semiconducting behavior",
author = "Yunlong Jin and Yi Yang and Shah Valloppilly and Sy-Hwang Liou and Sellmyer, {David J}",
year = "2019",
month = "3",
day = "15",
doi = "10.1016/j.jmmm.2018.11.063",
language = "English (US)",
volume = "474",
pages = "343--346",
journal = "Journal of Magnetism and Magnetic Materials",
issn = "0304-8853",
publisher = "Elsevier",

}

TY - JOUR

T1 - Room-temperature magnetic Heusler compound Fe2Ti0.5Co0.5Si with semiconducting behavior

AU - Jin, Yunlong

AU - Yang, Yi

AU - Valloppilly, Shah

AU - Liou, Sy-Hwang

AU - Sellmyer, David J

PY - 2019/3/15

Y1 - 2019/3/15

N2 - The structural, magnetic and electron-transport properties of Fe2Ti0.5Co0.5Si are investigated. It is demonstrated that rapidly quenched Fe2Ti0.5Co0.5Si ribbons crystallize in the L21 structure, indicating a full Heusler compound, and exhibit ferromagnetism with a high Curie temperature of about 790 K. Moreover, Fe2Ti0.5Co0.5Si exhibits semiconducting behavior with a negative temperature coefficient of resistivity, a room-temperature resistivity of about 6.5 mΩ cm and a residual resistivity ρ0 of about 6.75 mΩ cm. The carrier concentration n is 1.15 × 1020 cm−3 at 5 K. The magnetic semiconducting behavior with a high Curie temperature makes this material promising for room-temperature spintronic and magnetic applications.

AB - The structural, magnetic and electron-transport properties of Fe2Ti0.5Co0.5Si are investigated. It is demonstrated that rapidly quenched Fe2Ti0.5Co0.5Si ribbons crystallize in the L21 structure, indicating a full Heusler compound, and exhibit ferromagnetism with a high Curie temperature of about 790 K. Moreover, Fe2Ti0.5Co0.5Si exhibits semiconducting behavior with a negative temperature coefficient of resistivity, a room-temperature resistivity of about 6.5 mΩ cm and a residual resistivity ρ0 of about 6.75 mΩ cm. The carrier concentration n is 1.15 × 1020 cm−3 at 5 K. The magnetic semiconducting behavior with a high Curie temperature makes this material promising for room-temperature spintronic and magnetic applications.

KW - Heusler compound

KW - High Curie temperature

KW - Magnetic semiconducting behavior

UR - http://www.scopus.com/inward/record.url?scp=85056556744&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85056556744&partnerID=8YFLogxK

U2 - 10.1016/j.jmmm.2018.11.063

DO - 10.1016/j.jmmm.2018.11.063

M3 - Article

VL - 474

SP - 343

EP - 346

JO - Journal of Magnetism and Magnetic Materials

JF - Journal of Magnetism and Magnetic Materials

SN - 0304-8853

ER -