NOTICE: Due to a lapse in annual appropriations, most of this website is not being updated. Learn more.
Form submissions will still be accepted but will not receive responses at this time. Sections of this site for programs using non-appropriated funds (such as NVLAP) or those that are excepted from the shutdown (such as CHIPS and NVD) will continue to be updated.
An official website of the United States government
Here’s how you know
Official websites use .gov
A .gov website belongs to an official government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.
Correlations Between the Magnetic and Structural Properties of Ca Doped BiMnO3
Published
Author(s)
H Woo, T A. Tyson, Mark Croft, S W. Cheong, Joseph Woicik
Abstract
Bi1-xCaxMnO3 (BCMO) is known to exhibit charge ordering for a much broader range of x than the classicLa1-xCaxMnO3 (LCMO) system. However, the properties of BCMO over the entire doping range are not well understood. We have performed magnetization and resistivity measurements as well as x-ray absorption and x-ray diffraction (XRD) measurements, on BCMO to correlate transport, structural and magnetic properties. The BCMO system is insulating and antiferromagnetic (AF) for the entire range of x studied (x > 0.4) except near x 0.9 where we find a canted spin arrangement with approximately one Bohr magneton per Mn site. Detailed magnetization measurement was performed as a function of field and temperature to explore the net moment on the Mn sites as a function of x and reveal the charge ordering and N el temperatures. X-ray absorption measurements reveal significant structural distortion in the Mn-O bond distributions with increasing Bi content which correlates directly with increasing charge ordering temperatures. Moreover, the x-ray diffraction data reveal splittings consistent with lower symmetry cells as Bi content increases. These structural-magnetic correlations point to the importance of Mn-O distortions in stabilizing the charge ordered state in the manganites.
Citation
Physical Review B (Condensed Matter and Materials Physics)
Woo, H.
, Tyson, T.
, Croft, M.
, Cheong, S.
and Woicik, J.
(2001),
Correlations Between the Magnetic and Structural Properties of Ca Doped BiMnO<sub>3</sub>, Physical Review B (Condensed Matter and Materials Physics)
(Accessed October 16, 2025)