Mechanical magnetoresistance in broken cold-pressed CrO2 powder sample

H. Liu; R. K. Zheng; Y. Wang; X. X. Zhang

doi:10.1016/j.jmmm.2005.09.007

Mechanical magnetoresistance in broken cold-pressed CrO₂ powder sample

H. Liu, R. K. Zheng, Y. Wang, X. X. Zhang^*

^*Corresponding author for this work

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

1 Scopus citations

Abstract

Large negative magnetoresistance (MR)(|ΔR/R|=|[R(H)-R _max]/R_max|>50%) has been observed in the broken cold-pressed CrO₂ powder samples near the room temperature, which is ascribed to the magnetic field-induced mechanical contact variation. This large, room-temperature negative MR might easily lead to a wrong conclusion that the spin-polarization is still very high at high temperatures. This observation may also point to the possibility to develop field sensors based on the mechanical MR.

Original language	English (US)
Pages (from-to)	211-215
Number of pages	5
Journal	Journal of Magnetism and Magnetic Materials
Volume	302
Issue number	1
DOIs	https://doi.org/10.1016/j.jmmm.2005.09.007
State	Published - Jul 2006
Externally published	Yes

Keywords

CrO powder
Half metal
Magnetoresistance

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

Access to Document

10.1016/j.jmmm.2005.09.007

Cite this

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title = "Mechanical magnetoresistance in broken cold-pressed CrO2 powder sample",

abstract = "Large negative magnetoresistance (MR)(|ΔR/R|=|[R(H)-R max]/Rmax|>50%) has been observed in the broken cold-pressed CrO2 powder samples near the room temperature, which is ascribed to the magnetic field-induced mechanical contact variation. This large, room-temperature negative MR might easily lead to a wrong conclusion that the spin-polarization is still very high at high temperatures. This observation may also point to the possibility to develop field sensors based on the mechanical MR.",

keywords = "CrO powder, Half metal, Magnetoresistance",

author = "H. Liu and Zheng, {R. K.} and Y. Wang and Zhang, {X. X.}",

year = "2006",

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language = "English (US)",

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pages = "211--215",

journal = "Journal of Magnetism and Magnetic Materials",

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AU - Liu, H.

AU - Zheng, R. K.

AU - Wang, Y.

AU - Zhang, X. X.

PY - 2006/7

Y1 - 2006/7

N2 - Large negative magnetoresistance (MR)(|ΔR/R|=|[R(H)-R max]/Rmax|>50%) has been observed in the broken cold-pressed CrO2 powder samples near the room temperature, which is ascribed to the magnetic field-induced mechanical contact variation. This large, room-temperature negative MR might easily lead to a wrong conclusion that the spin-polarization is still very high at high temperatures. This observation may also point to the possibility to develop field sensors based on the mechanical MR.

AB - Large negative magnetoresistance (MR)(|ΔR/R|=|[R(H)-R max]/Rmax|>50%) has been observed in the broken cold-pressed CrO2 powder samples near the room temperature, which is ascribed to the magnetic field-induced mechanical contact variation. This large, room-temperature negative MR might easily lead to a wrong conclusion that the spin-polarization is still very high at high temperatures. This observation may also point to the possibility to develop field sensors based on the mechanical MR.

KW - CrO powder

KW - Half metal

KW - Magnetoresistance

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JF - Journal of Magnetism and Magnetic Materials

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