Signature of magnetic phase separation in the ground state of Pr 1 − x Ca x MnO 3

Published

August 27, 2008

Author(s)

Hao Sha, F Ye, Pengcheng Dai, J. A. Fernandez-Baca, D Mesa, Jeffrey Lynn, Y Tomioka, Y Tokura, Jiandi Zhang

Abstract

Neutron scattering has been used to investigate the evolution of long- and short-range charge-ordered (CO), ferromagnetic, and antiferromagnetic (AF) correlations in single crystals of Pr1−xCaxMnO3. The existence and population of spin clusters as reflected by short-range correlations are found to drastically depend on the doping and temperature. Concentrated spin clusters coexist with long-range canted AF order in a wide temperature range in the x=0.3 while clusters do not appear in the x=0.4 crystal. In contrast, both CO and AF order parameters in the x=0.35 crystal show a precipitous decrease below ∼35K where spin clusters form. These results provide direct evidence of magnetic phase separation and demonstrate a critical doping xc (close to x=0.35) that divides the inhomogeneous from homogeneous CO ground state.

Citation

Physical Review B

Volume

78

Issue

5

Pub Type

Journals

Download Paper

https://doi.org/10.1103/PhysRevB.78.052410

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Keywords

Neutron Diffraction, charge order, magnetic order, phase separation, manganite

Citation

Sha, H. , Ye, F. , Dai, P. , Fernandez-Baca, J. , Mesa, D. , Lynn, J. , Tomioka, Y. , Tokura, Y. and Zhang, J. (2008), Signature of magnetic phase separation in the ground state of Pr 1 − x Ca x MnO 3, Physical Review B, [online], https://doi.org/10.1103/PhysRevB.78.052410, https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=610076 (Accessed May 8, 2024)