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- W1988609145 abstract "Single-crystalline samples of a new Zintl compound, Eu3Ga2P4, have been synthesized by a Ga-flux method. Eu3Ga2P4 is found to crystallize in a monoclinic unit cell, space group C2/c, isostructural to Ca3Al2As4. The structure is composed of a pair of edge-shared GaP4 tetrahedra, which link by corner-sharing to form Ga2P4 two-dimensional layers, separated by Eu2+ ions. Magnetic susceptibility showed a Curie–Weiss behavior with an effective magnetic moment consistent with the value for Eu2+ magnetic ions. Below 15 K, ferromagnetic ordering was observed and the saturation magnetic moment was 6.6 μB. Electrical resistivity measurements on a single crystal showed semiconducting behavior. Resistivity in the temperature range between 280 and 300 K was fit by an activation model with an energy gap of 0.552(2) eV. The temperature dependence of the resistivity is better described by the variable-range-hopping model for a three-dimensional conductivity, suggesting that Eu–P bonds are involved in the conductivity. A large magnetoresistance, up to −30%, is observed with a magnetic field H = 2 T at T = 100 K, suggesting strong coupling of carriers with the Eu2+ magnetic moment." @default.
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- W1988609145 date "2012-02-16" @default.
- W1988609145 modified "2023-10-14" @default.
- W1988609145 title "Crystal Structure and a Giant Magnetoresistance Effect in the New Zintl Compound Eu<sub>3</sub>Ga<sub>2</sub>P<sub>4</sub>" @default.
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- W1988609145 doi "https://doi.org/10.1021/ic202018r" @default.
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