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Noriki Terada,Yoshinori Tsuchiya,Hideaki Kitazawa,Naoto Metoki 한국물리학회 2013 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.62 No.12
We have investigated the magnetic and the nonmagnetic impurity substitution effects on themagnetic ordering of a frustrated isosceles-triangular-lattice antiferromagnet CuMnO2 by meansof magnetic neutron diffraction measurements on Cu(Mn1−yGay)O2. While the magnetic wavevector of the magnetic ground state of “magnetically”-substituted Cu(Mn1−xCux)O2 with x = 0.04is Q = (¯1212 0), that in the “nonmagnetically”-substituted Cu(Mn1−yGay)O2with y =0.05, 0.15and 0.20 is Q = (¯121212 ), which is identical to that of pure CuMnO2. We discuss the influence ofmagnetic or nonmagnetic impurity substitution on the magnetic ordering of CuMnO2, by comparingthe results for Cu(Mn1−yGay)O2with that for Cu(Mn1−xCux)O2.
Magnetism of SrM3P4O14 (M2+ = 3d Ions) Investigated Using Neutron-scattering Measurements
Masashi Hase,Andreas D¨onni,Osamu Sakai,Kiyoshi Ozawa,Hideaki Kitazawa,Vladimir Yu. Pomjakushin,Lukas Keller,Tao Yang,Rihong Cong,Jianhua Lin 한국물리학회 2013 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.62 No.12
The substances SrM3P4O14 (M = Mn, Fe, Co or Ni) have the same crystal structure. However,the magnetism of SrMn3P4O14 differs qualitatively from that of the other substances. We determinedthe magnetic structures of SrM3P4O14 (M = Mn or Co) by using neutron powder diffractionmeasurements. The spin system in SrMn3P4O14 can be regarded as a trimerized spin chain, whichis consistent with the spin system inferred from the crystal structure and the appearance of the 1/3quantum magnetization plateau. The spin system in SrCo3P4O14 is not a trimerized spin chain.