TY - JOUR
T1 - Synthesis, magnetic properties, and colossal magnetoresistance of Eu13.97Gd0.03MnSb11
AU - Chan, Julia Y.
AU - Kauzlarich, Susan M.
AU - Klavins, Peter
AU - Liu, J. Z.
AU - Shelton, Robert N.
AU - Webb, David J.
PY - 2000
Y1 - 2000
N2 - The synthesis, crystal structure, magnetization, and resistivity of Gd-doped Eu14MnSb11, Eu13.97Gd0.03MnSb11, are reported and compared to Eu14MnSb11 and Eu14MnBi11. All three compounds are isostructural with the Zintl compound Ca14AlSb11. The Gd-doped Eu transition metal Zintl compound crystallizes in the tetragonal space group I41/acd with a=17.338(3) Å and c=22.691(5) Å, where Gd partially replaces Eu in the structure. The compound displays three magnetic phase transitions: a ferromagnetic transition near 80 K, an apparent antiferromagnetic transition at a field-dependent TN (TN=30 K in zero field), and a spin-reorientation transition with a transition temperature that is near 15 K in zero field but is also field dependent. Measurements of both zero-field resistivity for 5≤T≤300 K and the magnetoresistance in fields up to 5 T for the same temperatures are presented. Negative magnetoresistance is observed over a wide range of temperatures below 200 K.
AB - The synthesis, crystal structure, magnetization, and resistivity of Gd-doped Eu14MnSb11, Eu13.97Gd0.03MnSb11, are reported and compared to Eu14MnSb11 and Eu14MnBi11. All three compounds are isostructural with the Zintl compound Ca14AlSb11. The Gd-doped Eu transition metal Zintl compound crystallizes in the tetragonal space group I41/acd with a=17.338(3) Å and c=22.691(5) Å, where Gd partially replaces Eu in the structure. The compound displays three magnetic phase transitions: a ferromagnetic transition near 80 K, an apparent antiferromagnetic transition at a field-dependent TN (TN=30 K in zero field), and a spin-reorientation transition with a transition temperature that is near 15 K in zero field but is also field dependent. Measurements of both zero-field resistivity for 5≤T≤300 K and the magnetoresistance in fields up to 5 T for the same temperatures are presented. Negative magnetoresistance is observed over a wide range of temperatures below 200 K.
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M3 - Article
AN - SCOPUS:0001004152
VL - 61
SP - 459
EP - 463
JO - Physical Review B-Condensed Matter
JF - Physical Review B-Condensed Matter
SN - 0163-1829
IS - 1
ER -