TY - JOUR
T1 - Neutron investigation of Ru-doped Nd1/2Ca1/2MnO 3 - Comparison with Cr-doped Nd1/2Ca1/2MnO 3
AU - Moritomo, Yutaka
AU - Machidai, Akihiko
AU - Nonobe, Toshihiko
AU - Ohoyama, Kenji
PY - 2002/7/1
Y1 - 2002/7/1
N2 - Lattice and magnetic properties are investigated for 3% Ru- and Cr-doped Nd1/2Ca1/2MnO3. The parent Nd 1/2Ca1/2MnO3 is a charge-ordered insulator (TCO = 250 K). With decreasing temperature below ≈210 K, these compounds are separated into two perovskite phases, that is, the long-c and short-c phases. The long-c region shows a ferromagnetic transition at T C ≈ 210 K for the Ru-doped compound and ≈130 K for the Cr-doped compound, while the short-c region shows antiferromagnetic transition at TN ≈ 150 K for Ru and ≈110 K for Cr. We discuss the origin of the enhanced Tc for the Ru-doped compound in terms of the effective one-electron bandwidth W of the eg-band.
AB - Lattice and magnetic properties are investigated for 3% Ru- and Cr-doped Nd1/2Ca1/2MnO3. The parent Nd 1/2Ca1/2MnO3 is a charge-ordered insulator (TCO = 250 K). With decreasing temperature below ≈210 K, these compounds are separated into two perovskite phases, that is, the long-c and short-c phases. The long-c region shows a ferromagnetic transition at T C ≈ 210 K for the Ru-doped compound and ≈130 K for the Cr-doped compound, while the short-c region shows antiferromagnetic transition at TN ≈ 150 K for Ru and ≈110 K for Cr. We discuss the origin of the enhanced Tc for the Ru-doped compound in terms of the effective one-electron bandwidth W of the eg-band.
KW - B-site substitution
KW - Neutron powder diffraction
KW - Perovskite manganite
KW - Rietveld analysis
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U2 - 10.1143/JPSJ.71.1626
DO - 10.1143/JPSJ.71.1626
M3 - Article
AN - SCOPUS:0036331537
VL - 71
SP - 1626
EP - 1629
JO - Journal of the Physical Society of Japan
JF - Journal of the Physical Society of Japan
SN - 0031-9015
IS - 7
ER -