Enhancing low-field magnetoresistance in magnetite nanoparticles via zinc substitution

2018 ◽  
Vol 20 (25) ◽  
pp. 17245-17252 ◽  
Author(s):  
Tao Wang ◽  
Zhong-Zhi Luan ◽  
Jing-Yuan Ge ◽  
Ling Liu ◽  
Di Wu ◽  
...  
Keyword(s):  
Magnetite Nanoparticles ◽  
Room Temperature ◽  
Magnetization Direction ◽  
Zn Doping ◽  
Low Field

Zn-doping facilitates the alignment of magnetization direction of sub-10 nm Fe3O4 nanoparticles and enhances room temperature low-field magnetoresistance (LFMR).

Room-temperature and low-field magnetoresistance of La-Sr-Mn-O thin films

1999 ◽  
Vol 35 (5) ◽  
pp. 2844-2846 ◽  
Author(s):  
Kyung-Ku Choi ◽  
T. Taniyama ◽  
Y. Yamazaki
Keyword(s):  
Thin Films ◽  
Room Temperature ◽  
Low Field

One-Pot Synthesis of Water Soluble, Extremely Small-Sized Superparamagnetic Magnetite Nanoparticles

2012 ◽  
Vol 531 ◽  
pp. 219-222
Author(s):  
Li Hua Shen ◽  
Ting Shang ◽  
Jun Zhou ◽  
Dong Wang ◽  
Yu Han ◽  
...  
Keyword(s):  
Magnetite Nanoparticles ◽  
Room Temperature ◽  
Colloidal Stability ◽  
Aqueous Media ◽  
Mri Contrast Agents ◽  
Water Soluble ◽  
Potential Candidate ◽  
One Pot ◽  
Mri Contrast

Extremely small-sized superparamagnetic magnetite nanoparticles of 3Cit). The resulting Cit-coated magnetite nanoparticles exhibited long-term colloidal stability in aqueous media without any surface modification. Regarding the magnetic properties, the nanoparticles were superparamagnetic at room temperature, and might be the potential candidate for MRI contrast agents.

Magnetoresistance and Structure of Granular Co/Ag Thin Films

1993 ◽  
Vol 313 ◽  
Author(s):  
Mary Beth Stearns ◽  
Yuanda Cheng
Keyword(s):  
Electron Microscopy ◽  
Thin Films ◽  
Room Temperature ◽  
Magnetization Measurements ◽  
X Ray ◽  
Conduction Electrons ◽  
Low Field ◽  
Co Concentration ◽  
Microscopy Techniques ◽  
Substrate Temperatures

ABSTRACTSeveral series of CoxAg1-x granular thin films (-3000Å) were fabricated by coevapora-tion of Co and Ag in a dual e-beam UHV deposition system at varying substrate temperatures. These films have low field magnetoresistance values as large as 31% at room temperature and 65% at liquid N2 temperature. The structure of the films was determined using magnetization measurements as well as x-ray and various electron microscopy techniques. The composition was determined using Rutherford backscattering spectroscopy. The Magnetoresistance was measured at both room and liquid N2 temperatures.We deduce from the magnetization and RBS Measurements that the films consist of Co globules embedded in a Ag Matrix and that there is no appreciable mixing of the Co and Ag atoms in the films deposited at substrate temperatures ≥ 400°K. The size of the Co globules is seen to increase with increasing Co concentration and the maximum magnetoresistance occurs in those films having the smallest Ag thickness which provides magnetic isolation of the Co globules.We suggest that the large magnetoresistance of these films arises from the same mechanism which causes the low field magnetoresistance in pure ferromagnets, namely, the scattering of the highly polarized d conduction electrons of the Co at magnetic boundaries. The large increase in the room temperature magnetoresistance of the CO/Ag films as compared to those of pure 3d ferromagnetic films is due to the distance between the magnetic boundaries being reduced to a few nanometers, because of the small size of the single domain Co globules, as compared to a few microns in 3d ferromagnets.

Low-field formation of room-temperature biskyrmions in centrosymmetric MnPdGa magnet

2019 ◽  
Vol 114 (14) ◽  
pp. 142404 ◽  
Author(s):  
Xiaofei Xiao ◽  
Licong Peng ◽  
Xinguo Zhao ◽  
Ying Zhang ◽  
Yingying Dai ◽  
...  
Keyword(s):  
Room Temperature ◽  
Low Field ◽  
Field Formation

scholarly journals Room-Temperature Low-Field Colossal Magnetoresistance in Double-Perovskite Manganite

2019 ◽  
Vol 123 (12) ◽  
Author(s):  
S. Yamada ◽  
N. Abe ◽  
H. Sagayama ◽  
K. Ogawa ◽  
T. Yamagami ◽  
...  
Keyword(s):  
Colossal Magnetoresistance ◽  
Room Temperature ◽  
Double Perovskite ◽  
Perovskite Manganite ◽  
Low Field

Enhancement of the low-field magnetoresistance of La1−x−yCaxSryMnO3+d at room temperature

2001 ◽  
Vol 89 (2) ◽  
pp. 1271-1274 ◽  
Author(s):  
S. Kolesnik ◽  
B. Dabrowski ◽  
Z. Bukowski ◽  
J. Mais
Keyword(s):  
Room Temperature ◽  
Low Field

Giant magneto-caloric effect around room temperature at moderate low field variation in La0.7(Ca1−xSrx)0.3MnO3 perovskites

2009 ◽  
Vol 404 (16) ◽  
pp. 2495-2498 ◽  
Author(s):  
M.S. Islam ◽  
D.T. Hanh ◽  
F.A. Khan ◽  
M.A. Hakim ◽  
D.L. Minh ◽  
...  
Keyword(s):  
Room Temperature ◽  
Field Variation ◽  
Low Field ◽  
Caloric Effect

scholarly journals Studies on Low-Field and Room-Temperature Magnetoresistance in La2/3(Ca1−x Sr x )1/3MnO3 Perovskites

2012 ◽  
Vol 26 (3) ◽  
pp. 719-723 ◽  
Author(s):  
D. G. Li ◽  
Y. T. Mai ◽  
J. Xoing ◽  
Y. H. Xiong ◽  
Z. L. Liu ◽  
...  
Keyword(s):  
Room Temperature ◽  
Low Field
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