Giant magnetoresistance associated with a first-order transition between two ferrimagnetic states in Mn2-xZnxSb (x < 0.3) compounds

Q. Zhang; Y. Q. Zhang; Y. B. Li; J. Du; W. J. Feng; D. Li; Z. D. Zhang

doi:10.1088/0022-3727/41/9/095007

Giant magnetoresistance associated with a first-order transition between two ferrimagnetic states in Mn_2-xZn_xSb (x < 0.3) compounds

Q. Zhang, Y. Q. Zhang, Y. B. Li, J. Du, W. J. Feng, D. Li, Z. D. Zhang

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

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Abstract

A giant magnetoresistance (GMR) is observed in the Mn_2-xZn _xSb (x < 0.3) system, with the largest MR ratio of -37.6% in a field of 5 T at 120 K for the Mn_1.9Zn_0.1Sb compound. Different from other Mn₂Sb-based compounds, the GMR in Mn _2-xZn_xSb is closely correlated with a field-induced transition from a weak ferrimagnetic (WFI) state to a ferrimagnetic (FI) state. It is understood that the influences of both super-zone gap and spin-dependent scattering are responsible for GMR in the present system. Magnetic hysteresis and phase coexistence of the WFI and the FI phases suggest that this WFI-FI transition is of first order. The different mechanisms responsible for butterfly loops of magnetization/resistivity curves in different magnetic states are discussed.

Original language	English
Article number	095007
Journal	Journal of Physics D: Applied Physics
Volume	41
Issue number	9
DOIs	https://doi.org/10.1088/0022-3727/41/9/095007
State	Published - May 7 2008
Externally published	Yes

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title = "Giant magnetoresistance associated with a first-order transition between two ferrimagnetic states in Mn2-xZnxSb (x < 0.3) compounds",

abstract = "A giant magnetoresistance (GMR) is observed in the Mn2-xZn xSb (x < 0.3) system, with the largest MR ratio of -37.6% in a field of 5 T at 120 K for the Mn1.9Zn0.1Sb compound. Different from other Mn2Sb-based compounds, the GMR in Mn 2-xZnxSb is closely correlated with a field-induced transition from a weak ferrimagnetic (WFI) state to a ferrimagnetic (FI) state. It is understood that the influences of both super-zone gap and spin-dependent scattering are responsible for GMR in the present system. Magnetic hysteresis and phase coexistence of the WFI and the FI phases suggest that this WFI-FI transition is of first order. The different mechanisms responsible for butterfly loops of magnetization/resistivity curves in different magnetic states are discussed.",

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AU - Zhang, Q.

AU - Zhang, Y. Q.

AU - Li, Y. B.

AU - Du, J.

AU - Feng, W. J.

AU - Li, D.

AU - Zhang, Z. D.

PY - 2008/5/7

Y1 - 2008/5/7

N2 - A giant magnetoresistance (GMR) is observed in the Mn2-xZn xSb (x < 0.3) system, with the largest MR ratio of -37.6% in a field of 5 T at 120 K for the Mn1.9Zn0.1Sb compound. Different from other Mn2Sb-based compounds, the GMR in Mn 2-xZnxSb is closely correlated with a field-induced transition from a weak ferrimagnetic (WFI) state to a ferrimagnetic (FI) state. It is understood that the influences of both super-zone gap and spin-dependent scattering are responsible for GMR in the present system. Magnetic hysteresis and phase coexistence of the WFI and the FI phases suggest that this WFI-FI transition is of first order. The different mechanisms responsible for butterfly loops of magnetization/resistivity curves in different magnetic states are discussed.

AB - A giant magnetoresistance (GMR) is observed in the Mn2-xZn xSb (x < 0.3) system, with the largest MR ratio of -37.6% in a field of 5 T at 120 K for the Mn1.9Zn0.1Sb compound. Different from other Mn2Sb-based compounds, the GMR in Mn 2-xZnxSb is closely correlated with a field-induced transition from a weak ferrimagnetic (WFI) state to a ferrimagnetic (FI) state. It is understood that the influences of both super-zone gap and spin-dependent scattering are responsible for GMR in the present system. Magnetic hysteresis and phase coexistence of the WFI and the FI phases suggest that this WFI-FI transition is of first order. The different mechanisms responsible for butterfly loops of magnetization/resistivity curves in different magnetic states are discussed.

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ER -

Giant magnetoresistance associated with a first-order transition between two ferrimagnetic states in Mn_2-xZn_xSb (x < 0.3) compounds

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