Evidence for the charge-ordered state and phase separation at room temperature in half-doped La0.5Ca0.5MnO3 films

被引：28
作者：
Park, S. Y.
Hyun, Y. H.
Lee, Y. P. [1 ]
Svetchnikov, V. L.
Kim, K. W.
Prokhorov, V. G.
机构：
[1] Hanyang Univ, Quantum Photon Sci Res Ctr, Seoul 133791, South Korea
[2] Hanyang Univ, Dept Phys, Seoul 133791, South Korea
[3] Delft Univ Technol, Natl Ctr HREM, NL-2628 AL Delft, Netherlands
[4] Sunmoon Univ, Dept Phys, Choongnam 336840, South Korea
[5] Natl Acad Sci Ukraine, Inst Met Phys, UA-03142 Kiev, Ukraine
来源：
APPLIED PHYSICS LETTERS | 2006年 / 89卷 / 05期
关键词：
D O I：
10.1063/1.2243340
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
The microstructure and the magnetotransport properties of La0.5Ca0.5MnO3 films, prepared by rf magnetron sputtering on a LaAlO3 substrate, have been investigated. The electron-diffraction and the high-resolution electron-microscopy studies reveal the coexistence at room temperature of double-period modulated (charge-ordered) and unmodulated (charge-disordered) phases. It is suggested that the high-temperature fragmentation of film results in the magnetic-phase-separated state at low temperatures. (c) 2006 American Institute of Physics.
引用
收藏
页数：3
相关论文
共 18 条
[1]  
ADOLLI G, 1998, PHYS REV LETT, V81, P4736
[2]   Influence of the ferroelastic twin domain structure on the {100} surface morphology of LaAlO3 HTSC substrates [J].
Bueble, S ;
Knorr, K ;
Brecht, E ;
Schmahl, WW .
SURFACE SCIENCE, 1998, 400 (1-3) :345-355
[3]   Charge-ordered stripes in La1-xCaxMnO3 with x>0.5 [J].
Chen, CH ;
Cheong, SW ;
Hwang, HY .
JOURNAL OF APPLIED PHYSICS, 1997, 81 (08) :4326-4330
[4]   Commensurate to incommensurate charge ordering and its real-space images in La0.5Ca0.5MnO3 [J].
Chen, CH ;
Cheong, SW .
PHYSICAL REVIEW LETTERS, 1996, 76 (21) :4042-4045
[5]   Phase separation in La0.5Ca0.5MnO3 observed by 55Mn and 139La NMR [J].
Dho, J ;
Kim, I ;
Lee, S .
PHYSICAL REVIEW B, 1999, 60 (21) :14545-14548
[6]   Real-space imaging of coexisting charge-ordered and monoclinic phases in La1-xCaxMnO3 (x=0.67 and 0.71) -: art. no. 220408 [J].
Loudon, JC ;
Midgley, PA .
PHYSICAL REVIEW B, 2005, 71 (22)
[7]   Weak charge-lattice coupling requires reinterpretation of stripes of charge order in La1-xCaxMnO3 -: art. no. 097202 [J].
Loudon, JC ;
Cox, S ;
Williams, AJ ;
Attfield, JP ;
Littlewood, PB ;
Midgley, PA ;
Mathur, ND .
PHYSICAL REVIEW LETTERS, 2005, 94 (09)
[8]   Direct evidence of phase coexistence in La0.5Ca0.5MnO3 [J].
Loudon, JC ;
Mathur, ND ;
Midgley, PA .
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 2004, 272 :13-14
[9]   Sign inversion of the high-field Hall slope in epitaxial La0.5Ca0.5MnO3 thin films -: art. no. 132410 [J].
Malfait, M ;
Gordon, I ;
Moshchalkov, VV ;
Bruynseraede, Y ;
Borghs, G ;
Wagner, P .
PHYSICAL REVIEW B, 2003, 68 (13)
[10]   Paired and unpaired charge stripes in the ferromagnetic phase of La0.5Ca0.5MnO3 [J].
Mori, S ;
Chen, CH ;
Cheong, SW .
PHYSICAL REVIEW LETTERS, 1998, 81 (18) :3972-3975
12