Europhys. Lett.
Volume 74, Number 3, May 2006
Page(s) 506 - 511
Section Condensed matter: electronic structure, electrical, magnetic, and optical properties
Published online 07 April 2006
Europhys. Lett., 74 (3), pp. 506-511 (2006)
DOI: 10.1209/epl/i2005-10561-8

Charge ordering melting and evidence for a metastable antiferromagnetic phase in $\chem{Nd_{0.5(1 - {\it x})}Ca_{0.5(1 + {\it x})}Mn_{1 - {\it x}}Ti_{\it x}O_{3}}$

Jiyu Fan, Li Pi, Kuang He, Wenqin Wang and Yuheng Zhang

Hefei High Magnetic Field Laboratory, University of Science and Technology of China Hefei 230026, PRC

received 23 March 2005; accepted in final form 9 March 2006
published online 7 April 2006

The magnetic properties and stability in $\chem{Nd_{0.5(1 - {\it x})}Ca_{0.5(1 + {\it x})}Mn_{1 - {\it x}}Ti_{\it x}O_{3}}$ ( $0.0\le x\le 0.10$) polycrystalline manganites have been studied. We find that the Ti-dopant causes the melting of the charge ordering state and the presence of the short-range antiferromagnetic phase. The electron-spin resonance spectra and M(H) hysteresis loops reveal that the antiferromagnetic coupling is weakened rather than strengthened upon temperature decreases. The short-range antiferromagnetic phase is metastable and transforms into the stable ferromagnetic state.

75.47.Lx - Manganites.
64.60.My - Metastable phases.
75.50.Ee - Antiferromagnetics.

© EDP Sciences 2006