Crossover from Positive to Negative Magnetoresistance in a Spinel

Dinah R. Parker; Mark A. Green; Steven T. Bramwell; Andrew S. Wills; Jason S. Gardner; Dan A. Neumann

doi:10.1021/ja036965a

Crossover from Positive to Negative Magnetoresistance in a Spinel

Dinah R. Parker, Mark A. Green, Steven T. Bramwell, Andrew S. Wills, Jason S. Gardner, Dan A. Neumann

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

26 Scopus citations

Abstract

We present a new class of colossal magnetoresistance materials based on a series of frustrated spinels. The spin glass-like compound Zn_0.95Cu_0.05Cr₂Se₄, shows a field-induced transition to a ferromagnetic, which is associated with a highly unusual negative magnetoresistance effect (MR > 80%) in low magnetic field. At higher temperatures there is an unprecedented crossover to positive magnetoresistance (MR > 50%).

Original language	English
Pages (from-to)	2710-2711
Number of pages	2
Journal	Journal of the American Chemical Society
Volume	126
Issue number	9
DOIs	https://doi.org/10.1021/ja036965a
State	Published - Mar 10 2004
Externally published	Yes

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10.1021/ja036965a

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title = "Crossover from Positive to Negative Magnetoresistance in a Spinel",

abstract = "We present a new class of colossal magnetoresistance materials based on a series of frustrated spinels. The spin glass-like compound Zn0.95Cu0.05Cr2Se4, shows a field-induced transition to a ferromagnetic, which is associated with a highly unusual negative magnetoresistance effect (MR > 80%) in low magnetic field. At higher temperatures there is an unprecedented crossover to positive magnetoresistance (MR > 50%).",

author = "Parker, {Dinah R.} and Green, {Mark A.} and Bramwell, {Steven T.} and Wills, {Andrew S.} and Gardner, {Jason S.} and Neumann, {Dan A.}",

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AU - Parker, Dinah R.

AU - Green, Mark A.

AU - Bramwell, Steven T.

AU - Wills, Andrew S.

AU - Gardner, Jason S.

AU - Neumann, Dan A.

PY - 2004/3/10

Y1 - 2004/3/10

N2 - We present a new class of colossal magnetoresistance materials based on a series of frustrated spinels. The spin glass-like compound Zn0.95Cu0.05Cr2Se4, shows a field-induced transition to a ferromagnetic, which is associated with a highly unusual negative magnetoresistance effect (MR > 80%) in low magnetic field. At higher temperatures there is an unprecedented crossover to positive magnetoresistance (MR > 50%).

AB - We present a new class of colossal magnetoresistance materials based on a series of frustrated spinels. The spin glass-like compound Zn0.95Cu0.05Cr2Se4, shows a field-induced transition to a ferromagnetic, which is associated with a highly unusual negative magnetoresistance effect (MR > 80%) in low magnetic field. At higher temperatures there is an unprecedented crossover to positive magnetoresistance (MR > 50%).

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Crossover from Positive to Negative Magnetoresistance in a Spinel

Abstract

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