Doping effects of hexagonal manganites Er{sub 1-x}Y{sub x}MnO{sub 3} with triangular spin structure
- Department of Physics and Institute of Basic Sciences, SungKyunKwan University, 440-746 Suwon (Korea, Republic of)
- Neutron Physics Laboratory, Korea Atomic Energy Research Institute, Daejon 305-600 (Korea, Republic of)
We have studied doping effects of hexagonal manganites Er{sub 1-x}Y{sub x}MnO{sub 3}, which are found to have 2D triangular spin structure for all the samples studied here. Upon doping Er at the Y site, the magnetic structure changes gradually from the {gamma}{sub 1} representation of YMnO{sub 3} to the {gamma}{sub 2} representation of ErMnO{sub 3} while the ordered moment remains almost unchanged in magnitude over the whole doping range. Despite the gradual change in the magnetic structure with doping, geometrical frustration effects expected of the 2D triangular spin structure with antiferromagnetic interaction between nearest neighbors show very strong doping dependence. For example, although YMnO{sub 3} shows all the signs of Mn moments being geometrically frustrated in the susceptibility and neutron diffraction data, such evidence of frustration effects is nearly absent in ErMnO{sub 3}. We suggest that magnetic coupling along the c axis between Er and Mn moments should be responsible for the drastic doping dependence of the geometrical frustration effects.
- OSTI ID:
- 20719107
- Journal Information:
- Physical Review. B, Condensed Matter and Materials Physics, Journal Name: Physical Review. B, Condensed Matter and Materials Physics Journal Issue: 1 Vol. 72; ISSN 1098-0121
- Country of Publication:
- United States
- Language:
- English
Similar Records
Spin texture induced by non-magnetic doping and spin dynamics in 2D triangular lattice antiferromagnet h-Y(Mn,Al)O3
Magnetic and dielectric behavior in YMn{sub 1−x}Fe{sub x}O{sub 3} (x ≤ 0.5)