Magnetoresistive switch effect in metal/semiconductor hybrid granular films: extremely huge magnetoresistance effect at room temperature

2002 ◽  
Vol 17 (4) ◽  
pp. 322-326 ◽  
Author(s):  
H Akinaga
Keyword(s):  
Room Temperature ◽  
Magnetoresistance Effect ◽  
Granular Films

scholarly journals Room-Temperature Extra-huge Magnetoresistance Effect in MnSb Granular Films.

2000 ◽  
Vol 24 (4−2) ◽  
pp. 451-454 ◽  
Author(s):  
H. Akinaga ◽  
M. Mizuguchi ◽  
K. Ono ◽  
M. Oshima
Keyword(s):  
Room Temperature ◽  
Magnetoresistance Effect ◽  
Granular Films

Magnetoresistive switch effect in MnSb granular films grown on sulfur-passivated GaAs: more-than 10 000% magnetoresistance effect at room-temperature

2001 ◽  
Vol 10 (1-3) ◽  
pp. 447-451 ◽  
Author(s):  
Hiro Akinaga ◽  
Masaki Mizuguchi ◽  
Takashi Manago ◽  
Toshihiko Sato ◽  
Hiromi Kuramochi ◽  
...  
Keyword(s):  
Room Temperature ◽  
Magnetoresistance Effect ◽  
Granular Films

Extraordinary anisotropic magnetoresistance effect at room temperature in Co/Ni multilayers

1996 ◽  
Vol 156 (1-3) ◽  
pp. 369-370
Author(s):  
C. Prados ◽  
D. García ◽  
F. Lesmes ◽  
J.J. Freijo ◽  
A. Hemando
Keyword(s):  
Room Temperature ◽  
Anisotropic Magnetoresistance ◽  
Magnetoresistance Effect

scholarly journals Magnetic properties of epitaxial Fe3O4 films with various crystal orientations and tunnel magnetoresistance effect at room temperature

2014 ◽  
Vol 105 (10) ◽  
pp. 102410 ◽  
Author(s):  
Taro Nagahama ◽  
Yuya Matsuda ◽  
Kazuya Tate ◽  
Tomohiro Kawai ◽  
Nozomi Takahashi ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Room Temperature ◽  
Magnetoresistance Effect ◽  
Tunnel Magnetoresistance ◽  
Crystal Orientations

scholarly journals Colossal Negative Magnetoresistance Effect in a La1.37Sr1.63Mn2O7 Single Crystal Grown by Laser-Diode-Heated Floating-Zone Technique

Crystals ◽  
2020 ◽  
Vol 10 (6) ◽  
pp. 547
Author(s):  
Si Wu ◽  
Yinghao Zhu ◽  
Junchao Xia ◽  
Pengfei Zhou ◽  
Haiyong Ni ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Single Crystal ◽  
Laser Diode ◽  
Room Temperature ◽  
Floating Zone ◽  
Magnetoresistance Effect ◽  
X Ray ◽  
Mr Effect ◽  
Distinct Features ◽  
The Magnetic Field

We have grown La 1.37 Sr 1.63 Mn 2 O 7 single crystals with a laser-diode-heated floating-zone furnace and studied the crystallinity, structure, and magnetoresistance (MR) effect by in-house X-ray Laue diffraction, X-ray powder diffraction, and resistance measurements. The La 1.37 Sr 1.63 Mn 2 O 7 single crystal crystallizes into a tetragonal structure with space group I4/mmm at room temperature. At 0 T, the maximum resistance centers around ∼166.9 K. Below ∼35.8 K, it displays an insulating character with an increase in resistance upon cooling. An applied magnetic field of B = 7 T strongly suppresses the resistance indicative of a negative MR effect. The minimum MR value equals −91.23% at 7 T and 128.7 K. The magnetic-field-dependent resistance shows distinct features at 1.67, 140, and 322 K, from which we calculated the corresponding MR values. At 14 T and 140 K, the colossal negative MR value is down to −94.04(5)%. We schematically fit the MR values with different models for an ideal describing of the interesting features of the MR value versus B curves.

One-dimensional phthalocyanine-based conductor with S = 3/2 isotropic magnetic centers

2014 ◽  
Vol 18 (08n09) ◽  
pp. 814-823 ◽  
Author(s):  
Yusuke Takita ◽  
Hiroyuki Hasegawa ◽  
Yukihiro Takahashi ◽  
Jun Harada ◽  
Akinori Kanda ◽  
...  
Keyword(s):  
Electrical Conductivity ◽  
Magnetic Susceptibility ◽  
Room Temperature ◽  
Magnetic Moments ◽  
Antiferromagnetic Interaction ◽  
Magnetoresistance Effect ◽  
Conduction Path ◽  
Local Moments ◽  
One Dimensional ◽  
Cr System

The axially ligated phthalocyanine conductor of TPP [ Cr ( Pc )( CN )2]2 (TPP = tetraphenylphosphonium and Pc = phthalocyaninato) with d3 (S = 3/2) metal Cr III has been successfully prepared. The crystal is completely isomorphous with those of the Co and Fe analogs, and the degree of π–π interaction is almost the same in these three salts. The electrical conductivity at room temperature of the Cr system is almost the same with that of the Fe system in which S = 1/2 magnetic centers embedded in the conduction path, and the temperature dependence reveals the development of the charge disproportionation reflecting the existence of magnetic moments. Magnetic susceptibility of the Cr system shows Curie-like behavior with isotropic local moments of S = 3/2. In contrast with the Fe system, only weak antiferromagnetic interaction operates between the localized d-spins. The resistance decreases when magnetic fields are applied, but the magnetoresistance effect is not so large compared with the Fe system, indicating that the π– d interaction in the Cr system is somewhat different from that in the Fe system.

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