Surface spin-glass behavior in La2/3Sr1/3MnO3 nanoparticles
作者： T. Zhu , B. G. Shen , J. R. Sun , H. W. Zhao , W. S. Zhan
DOI: 10.1063/1.1379597
关键词:
摘要: The low-temperature magnetic and transport properties of La2/3Sr1/3MnO3 nanoparticles have been investigated. It is found that a surface spin-glass behavior exists in nanoparticles, which undergo transition to frozen state below 45 K. even at the highest field used (H=50 kOe). Moreover, spin-glass-like disappears for particles above 50 nm. In addition, suppressed low-field magnetoconductivity (LFMC) observed low temperature nanosized obviously lower than expected upper limit LFMC, 1/3, polycrystalline manganites, proposed arise from higher-order tunneling through insulating layers.
scitation.org
harvard.edu
osti.gov
aip.org
sci-hub.se 参考文章(15)
B. Martínez, X. Obradors, Ll. Balcells, A. Rouanet, C. Monty, Low Temperature Surface Spin-Glass Transition in γ - Fe 2 O 3 Nanoparticles Physical Review Letters. ,vol. 80, pp. 181- 184 ,(1998) , 10.1103/PHYSREVLETT.80.181
Run-Wei Li, Han Xiong, Ji-Rong Sun, Qing-An Li, Zhi-Hong Wang, Jian Zhang, Bao-Gen Shen, Superparamagnetism and transport properties of ultrafine La2/3Ca1/3MnO3 powders Journal of Physics: Condensed Matter. ,vol. 13, pp. 141- 148 ,(2001) , 10.1088/0953-8984/13/1/314
XL Wang, SX Dou, HK Liu, M Ionescu, B Zeimetz, None, Large low-field magnetoresistance over a wide temperature range induced by weak-link grain boundaries in La0.7Ca0.3MnO3 Applied Physics Letters. ,vol. 73, pp. 396- 398 ,(1998) , 10.1063/1.121846
H. Y. Hwang, S-W. Cheong, N. P. Ong, B. Batlogg, Spin-Polarized Intergrain Tunneling in La 2/3 Sr 1/3 MnO 3 Physical Review Letters. ,vol. 77, pp. 2041- 2044 ,(1996) , 10.1103/PHYSREVLETT.77.2041
J. M. D. Coey, Powder magnetoresistance (invited) Journal of Applied Physics. ,vol. 85, pp. 5576- 5581 ,(1999) , 10.1063/1.369899
R Mahesh, R Mahendiran, AK Raychaudhuri, CNR Rao, None, Effect of particle size on the giant magnetoresistance of La0.7Ca0.3MnO3 Applied Physics Letters. ,vol. 68, pp. 2291- 2293 ,(1996) , 10.1063/1.116167
A. Gupta, G. Q. Gong, Gang Xiao, P. R. Duncombe, P. Lecoeur, P. Trouilloud, Y. Y. Wang, V. P. Dravid, J. Z. Sun, Grain-boundary effects on the magnetoresistance properties of perovskite manganite films Physical Review B. ,vol. 54, ,(1996) , 10.1103/PHYSREVB.54.R15629
J. Y. Gu, C. Kwon, Z. Trajanovic, T. Boettcher, R. L. Greene, R. Ramesh, T. Venkatesan, R. Shreekala, M. Rajeswari, K. Ghosh, A. Goyal, Effect of crystallinity on the magnetoresistance in perovskite manganese oxide thin films Applied Physics Letters. ,vol. 71, pp. 282- 284 ,(1997) , 10.1063/1.119520
T Zhu, C.H Yan, Z.M Wang, H.W Zhao, J.R Sun, B.G Shen, Low-field magnetoresistance in La2/3Sr1/3MnO3 granular composites by a sol-gel coating process Solid State Communications. ,vol. 117, pp. 471- 475 ,(2001) , 10.1016/S0038-1098(00)00498-1
Lei Zheng, Kebin Li, Yuheng Zhang, Effect of surface phonons on the properties of the granular manganese oxide La 0.67 Ca 0.33 MnO 3 Physical Review B. ,vol. 58, pp. 8613- 8616 ,(1998) , 10.1103/PHYSREVB.58.8613