Novel dynamical effects and persistent memory in phase separated manganites

被引:133
作者
Levy, P [1 ]
Parisi, F [1 ]
Granja, L [1 ]
Indelicato, E [1 ]
Polla, G [1 ]
机构
[1] Comis Nacl Energia Atom, Dept Fis, RA-1650 Buenos Aires, DF, Argentina
关键词
D O I
10.1103/PhysRevLett.89.137001
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
The time dependent response of the magnetic and transport properties of Fe-doped phase separated (PS) manganite La0.5Ca0.5MnO3 is reported. The nontrivial coexistence of ferromagnetic (FM) and non-FM regions induces a slow dynamics which leads to time relaxation and cooling rate dependence within the PS regime. This dynamics influences physical properties drastically. On one hand, metalliclike behavior, assumed to be a fingerprint of percolation, can be also observed before the FM phase percolates as a result of dynamical contributions. On the other hand, two novel effects for the manganites are reported, namely, the rejuvenation of the resistivity after aging and a persistent memory of low magnetic fields (<1 T), imprinted in the amount of the FM phase.
引用
收藏
页码:1370011 / 1370014
页数:4
相关论文
共 28 条
[1]   Colossal resistive relaxation effects in a Pr0.67Ca0.33MnO3 single crystal [J].
Anane, A ;
Renard, JP ;
Reversat, L ;
Dupas, C ;
Veillet, P ;
Viret, M ;
Pinsard, L ;
Revcolevschi, A .
PHYSICAL REVIEW B, 1999, 59 (01) :77-80
[2]   Low-temperature transition to a metallic state in (La0.5Pr0.5)0.7Ca0.3MnO3 films [J].
Babushkina, NA ;
Belova, LM ;
Khomskii, DI ;
Kugel, KI ;
Gorbenko, OY ;
Kaul, AR .
PHYSICAL REVIEW B, 1999, 59 (10) :6994-7000
[3]   Aging in glassy systems: new experiments, simple models, and open questions [J].
Bouchaud, JP .
SOFT AND FRAGILE MATTER: NONEQUILIBRIUM DYNAMICS, METASTABILITY AND FLOW, 2000, 53 :285-304
[4]   Persistent X-ray photoconductivity and percolation of metallic clusters in charge-ordered manganites [J].
Casa, D ;
Kiryukhin, V ;
Saleh, OA ;
Keimer, B ;
Hill, JP ;
Tomioka, Y ;
Tokura, Y .
EUROPHYSICS LETTERS, 1999, 47 (01) :90-96
[5]   Unusual x-ray transport phenomena in La1-xSrxMnO3 -: art. no. 100404 [J].
Casa, D ;
Keimer, B ;
von Zimmermann, M ;
Hill, JP ;
Habermeier, HU ;
Razavi, FS .
PHYSICAL REVIEW B, 2001, 64 (10)
[6]   Colossal magnetoresistant materials: The key role of phase separation [J].
Dagotto, E ;
Hotta, T ;
Moreo, A .
PHYSICS REPORTS-REVIEW SECTION OF PHYSICS LETTERS, 2001, 344 (1-3) :1-153
[7]   Magnetization studies of phase separation in La0.5Ca0.5MnO3 -: art. no. 104403 [J].
Freitas, RS ;
Ghivelder, L ;
Levy, P ;
Parisi, F .
PHYSICAL REVIEW B, 2002, 65 (10) :1044031-1044038
[8]   Temperature and field dependence of the phase separation, structure, and magnetic ordering in La1-xCaxMnO3 (x=0.47, 0.50, and 0.53) [J].
Huang, Q ;
Lynn, JW ;
Erwin, RW ;
Santoro, A ;
Dender, DC ;
Smolyaninova, VN ;
Ghosh, K ;
Greene, RL .
PHYSICAL REVIEW B, 2000, 61 (13) :8895-8905
[9]   Memory and chaos effects in spin glasses [J].
Jonason, K ;
Vincent, E ;
Hammann, J ;
Bouchaud, JP ;
Nordblad, P .
PHYSICAL REVIEW LETTERS, 1998, 81 (15) :3243-3246
[10]   Impurity effects on the electronic/magnetic ground states of perovskite manganites [J].
Katsufuji, T ;
Cheong, SW ;
Mori, S ;
Chen, CH .
JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 1999, 68 (04) :1090-1093