Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
2011-07-31
J. Phys. Soc. Jpn. 80 (2011) 094708
Physics
Condensed Matter
Strongly Correlated Electrons
11 pages, 5 figures, to be published in J. Phys. Soc. Jpn
Scientific paper
We examined the magnetic properties of the square-lattice antiferromagnets CeMnAsO and LaMnAsO and their solid solutions La1-xCexMnAsO by resistivity, magnetic susceptibility, and heat capacity measurements below room temperature. A first-order phase transition is observed at 34.1 K, below which the ground-state doublet of the Ce ion splits by 3.53 meV. It is likely that Mn moments already ordered above room temperature are reoriented at the transition, as reported for related compounds, such as NdMnAsO and PrMnSbO. This transition generates a large internal magnetic field at the Ce site in spite of the fact that simple Heisenberg interactions should be cancelled out at the Ce site owing to geometrical frustration. The transition takes place at nearly the same temperature with the substitution of La for Ce up to 90%. The Ce moment does not undergo long-range order by itself, but is parasitically induced at the transition, serving as a good probe for detecting the magnetism of Mn spins in a square lattice.
Hiroi Zenji
Matsuhira Kazuyuki
Okamoto Yoshihiko
Tsukamoto Yuto
Whangbo Myung-Hwan
No associations
LandOfFree
A Magnetic Transition Probed by the Ce Ion in Square-Lattice Antiferromagnet CeMnAsO does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with A Magnetic Transition Probed by the Ce Ion in Square-Lattice Antiferromagnet CeMnAsO, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and A Magnetic Transition Probed by the Ce Ion in Square-Lattice Antiferromagnet CeMnAsO will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-702376