Neutron Diffraction Study on Magnetic Structure in Layered Manganite La_2-2xSr_1+2xMn₂O₇ (x=0.307)

Abstract:

Magnetic structure in a layered perovskite manganite, La_2-2xSr_1+2xMn₂O₇ (x = 0.307) has been investigated by neutron diffraction measurements. We found that the ground state (at 4 K) has a ferromagnetic structure with magnetic moment of Mn ions being aligned in a direction inclined by 10 degree from the c-axis. The magnetic structure changes to a canted antiferromagnetic one (CAFM-I) at about 20 K and then to another canted antiferromagnetic one (CAFM-II) at about 80 K. Here the magnetic moment lies in the ab-plane in CAFM-II but not in CAFM-I. The magnetic structure then changes to an antiferromagnetic one with magnetic moment lies in the ab-plane at about 90 K, and then to a paramagnetic one at about 100 K.

• Periodical: Solid State Phenomena (Volumes 172-174)
• Pages: 1301-1306
• DOI: https://doi.org/10.4028/www.scientific.net/SSP.172-174.1301
• Online since: June 2011
• Authors: Hirosuke Sonomura, Tomoyuki Terai, Tomoyuki Kakeshita, Toyotaka Osakabe, Kazuhisa Kakurai, Yoshihiro Kuroiwa, Chikako Moriyoshi, Toshinori Okubo, Kenichi Kato, Jungeun Kim, Masaki Takata
• Keywords: Crystal Field, Magnetic Structure, Neutron Diffraction Measurements, Phase Transition

References

[1] T. Kimura, Y. Tomioka, A. Asamitsu, Y. Tokura: Phys. Rev. Lett. 81 5920 (1998).

[2] M. Kubota, H. Fujioka, K. Hirota, K. Ohoyama, Y. Moritomo, H. Yoshizawa, and Y. Endoh: J. Phys. Soc. Jpn. 69, 1606 (2000).

[3] C. D. Ling, J. E. Millburn, J. F. Mitchell, D. N. Argyriou, J. Linton, and H. N. Bordallo: Phys. Rev. B 62, 15096 (2000).

[4] R. Ganguly I K Gopalakrishnan and J V Yakhmi: J. Phys. Condens. Matter 13, 3805-3807 (2001).

[5] T. Murata, T. Terai, T. Fukuda, T. Kakeshita: J. Mag. Mag. Mat. 303 138 (2006).