Enhanced Magnetic Properties and Spin-Phonon Coupling of Single-Crystalline BiFeO3 Nanorods Prepared by Hydrothermal Technique

2012 ◽  
Vol 560-561 ◽  
pp. 766-770 ◽  
Author(s):  
Yu Deng ◽  
Di Wu ◽  
You Wei Du
Keyword(s):  
Spin Glass ◽  
Room Temperature ◽  
Weak Ferromagnetism ◽  
Phonon Coupling ◽  
Hydrothermal Technique ◽  
Single Crystalline ◽  
Glass Type ◽  
Size And Morphology ◽  
Hydrothermal Methods ◽  
Strong Spin

By hydrothermal methods single-crystalline BiFeO3 (BFO) nanorods with diameters of 15-40nm and lengths of 100-400nm were synthesized. The rhombohedra phased nanorods grow along the [110] direction. The nanorods show weak ferromagnetism at room temperature and enhanced spin-glass type magnetism at low temperature. Around 100K, a strong spin-two-phonon coupling has been detected, confirming the spin-glass freezing behaviors. With emphasis on the size and morphology, the enhanced magnetism and the spin-glass freezing of the BFO nanorods have been discussed.

Preparation of High-Purity Ultrafine α-Al2O3 by Solid-State Reaction at Room Temperature

2008 ◽  
Vol 368-372 ◽  
pp. 683-685
Author(s):  
Cheng Wei Hao ◽  
Bo Lin Wu ◽  
Ji Yan Li
Keyword(s):  
Solid State ◽  
High Purity ◽  
Solid State Reaction ◽  
Room Temperature ◽  
Raw Materials ◽  
Phase Particle ◽  
Phase Transformation Temperature ◽  
Particle Size And Morphology ◽  
Size And Morphology ◽  
Α Al2o3

Ammonium aluminium carbonate hydroxide (AACH), with a small quantity of γ-AlOOH, was synthesized through solid-state reaction at room temperature using AlCl3·6H2O and NH4HCO3 as raw materials and polyethylene glycol (PEG-10000) as the dispersant. After calcined at 1100°C for 1.5h, α-Al2O3 powders with primary particle sizes of 20~30nm were obtained. The crystal phase, particle size and morphology of the high-purity ultrafine α-Al2O3 were characterized. The results showed that a small quantity of γ-AlOOH in the AACH decomposed and formed crystal seeds. The presence of crystal seeds reduced the nucleation activation energy and therefore reduced the phase transformation temperature.

Enhanced room temperature magnetoresistance and cluster spin glass behavior in Mo doping La0.67Sr0.33MnO3

2009 ◽  
Vol 105 (12) ◽  
pp. 123910 ◽  
Author(s):  
L. Chen ◽  
J. H. He ◽  
Y. Mei ◽  
Y. Z. Cao ◽  
B. Q. Liu ◽  
...  
Keyword(s):  
Spin Glass ◽  
Room Temperature ◽  
Mo Doping ◽  
Spin Glass Behavior ◽  
Cluster Spin Glass ◽  
Glass Behavior

Room-temperature spin glass and its photocontrol in spinel ferrite films

2000 ◽  
Vol 77 (24) ◽  
pp. 4016-4018 ◽  
Author(s):  
Yuji Muraoka ◽  
Hitoshi Tabata ◽  
Tomoji Kawai
Keyword(s):  
Spin Glass ◽  
Room Temperature ◽  
Spinel Ferrite ◽  
Ferrite Films

Ultralong Single‐Crystalline Ag2S Nanowires: Promising Candidates for Photoswitches and Room‐Temperature Oxygen Sensors

2008 ◽  
Vol 20 (13) ◽  
pp. 2628-2632 ◽  
Author(s):  
Dingsheng Wang ◽  
Chenhui Hao ◽  
Wen Zheng ◽  
Qing Peng ◽  
Taihong Wang ◽  
...  
Keyword(s):  
Room Temperature ◽  
Oxygen Sensors ◽  
Single Crystalline

Novel Near-Room-Temperature Type I Multiferroic: Pb(Fe0.5Ti0.25W0.25)O3 with Coexistence of Ferroelectricity and Weak Ferromagnetism

2012 ◽  
Vol 24 (14) ◽  
pp. 2664-2672 ◽  
Author(s):  
Sebastián A. Larrégola ◽  
José C. Pedregosa ◽  
Miguel Algueró ◽  
Ricardo Jiménez ◽  
Mar García-Hernandez ◽  
...  
Keyword(s):  
Room Temperature ◽  
Weak Ferromagnetism ◽  
Type I

scholarly journals Resonant exciton-phonon coupling in ZnO nanorods at room temperature

AIP Advances ◽  
2011 ◽  
Vol 1 (3) ◽  
pp. 032135 ◽  
Author(s):  
Soumee Chakraborty ◽  
S. Dhara ◽  
T. R. Ravindran ◽  
S. Sarkar Pal ◽  
M. Kamruddin ◽  
...  
Keyword(s):  
Room Temperature ◽  
Zno Nanorods ◽  
Phonon Coupling

Magnetic anisotropy and spin-glass behavior in single crystalline U2PdSi3

2011 ◽  
Vol 23 (7) ◽  
pp. 076003 ◽  
Author(s):  
D X Li ◽  
A Kimura ◽  
Y Haga ◽  
S Nimori ◽  
T Shikama
Keyword(s):  
Magnetic Anisotropy ◽  
Spin Glass ◽  
Single Crystalline ◽  
Spin Glass Behavior ◽  
Glass Behavior

An Effective Strategy for Room-Temperature Synthesis of Single-Crystalline Palladium Nanocubes and Nanodendrites in Aqueous Solution

2009 ◽  
Vol 9 (5) ◽  
pp. 2335-2340 ◽  
Author(s):  
Feng-Ru Fan ◽  
Adel Attia ◽  
Ujjal Kumar Sur ◽  
Jian-Bin Chen ◽  
Zhao-Xiong Xie ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Room Temperature ◽  
Effective Strategy ◽  
Temperature Synthesis ◽  
Single Crystalline ◽  
Room Temperature Synthesis
Sign in / Sign up

Export Citation Format

Share Document