Magnetoresistance and Exchange Bias Effect of (Co2MnSi)1-X-(NiO)X Nanocomposites

2011 ◽  
Vol 399-401 ◽  
pp. 620-624
Author(s):  
Xin Le Cai ◽  
Shan Dong Li ◽  
Mei Mei Liu ◽  
Jian Peng Wu ◽  
Yi Hu ◽  
...  
Keyword(s):  
Mechanical Alloying ◽  
Exchange Bias ◽  
Heusler Alloy ◽  
Nio Nanoparticles ◽  
Bias Effect ◽  
Exchange Bias Effect

The (Co2MnSi)1-x-(NiO)x(x = 0.0, 0.1, 0.2, 0.3) nanocomposites were fabricated by mechanical alloying using Co2MnSi Heusler alloy and NiO nanoparticles. It is revealed that antiferromagnetic NiO nanocrystallines dramatically enhances the magnetoresistance of the nanocomposites more than 20 times larger than that of the NiO-free Co2MnSi alloys at 300 K. The Exchange bias effect of the nanocomposites suggests that the spin-dependent tunneling and scattering at the interfaces of ferromagnetic/antiferromagnetic are responsible for the enhancement of the magnetoresistance.

scholarly journals On the exchange bias effect in NiO nanoparticles with a core(antiferromagnetic)/shell (spin glass) morphology

2015 ◽  
Vol 663 ◽  
pp. 012001 ◽  
Author(s):  
N Rinaldi-Montes ◽  
P Gorria ◽  
D Martínez-Blanco ◽  
A B Fuertes ◽  
L Fernández Barquín ◽  
...  
Keyword(s):  
Spin Glass ◽  
Exchange Bias ◽  
Nio Nanoparticles ◽  
Bias Effect ◽  
Exchange Bias Effect

Observation of giant exchange bias effect in Ni-Mn-Ti all-d-metal Heusler alloy

2021 ◽  
Author(s):  
Saheli Samanta ◽  
Subrata Ghosh ◽  
Kalyan Mandal
Keyword(s):  
Exchange Bias ◽  
Heusler Alloy ◽  
Magnetic Relaxation ◽  
Training Effect ◽  
Magnetic Memory ◽  
Relaxation Processes ◽  
Bias Effect ◽  
Exchange Bias Effect ◽  
Intrinsic Nature ◽  
Unidirectional Anisotropy

Abstract We report a giant exchange bias (EB) field of about 3.68 KOe during field cooled process in all-d-metal Ni40(FeCo)4Mn36Ti20 Heusler alloy. The study of magnetic memory effect and isothermal magnetic relaxation processes suggest that the giant EB field arises due to the possible coexistence of antiferromagnetic (AFM) and ferromagnetic (FM) phase exchange interaction in the studied system at temperatures below 35 K. Furthermore, the temperature and cooling field dependence of EB effect are analyzed which are related to the change in unidirectional anisotropy at FM/AFM interface. The study of a well-established training effect confirms the intrinsic nature of the observed EB behavior. This result will open up a new way towards the development of EB materials considering all-d-metal Heusler alloy systems.

scholarly journals Exchange Bias Effect in Full-Heusler Alloy Co$_2$Cr$_0.6$Fe$_0.4$Al Epitaxial Thin Films

2006 ◽  
Vol 42 (10) ◽  
pp. 3002-3004 ◽  
Author(s):  
T. Ishikawa ◽  
T. Mar ◽  
K.-I. Matsuda ◽  
T. Uemura ◽  
M. Yamamoto
Keyword(s):  
Thin Films ◽  
Exchange Bias ◽  
Heusler Alloy ◽  
Epitaxial Thin Films ◽  
Bias Effect ◽  
Exchange Bias Effect ◽  
Full Heusler

Tuning Exchange Bias Effect in Ni50Mn36Sn14 Heusler Alloy

2013 ◽  
Vol 320 ◽  
pp. 60-66
Author(s):  
Zhe Li ◽  
Cheng Yang ◽  
Ming Xin Wang ◽  
Jian Yin ◽  
Jun Jun Wu ◽  
...  
Keyword(s):  
Hysteresis Loop ◽  
Exchange Bias ◽  
Heusler Alloy ◽  
Bias Effect ◽  
Exchange Bias Effect ◽  
Martensitic State ◽  
Loop Measurement ◽  
Shifted Hysteresis Loop

The tuning exchange bias HE at martensitic state of Ni50Mn36Sn14 alloy has been investigated by means of hysteresis loop measurement. It was found that the whole loop can be tuned by HFC from a double-shifted to a single-shifted hysteresis loop, leading to an appearance of maximum HEat HFC = 0.5 kOe. This behavior could be ascribed to the competition between two types of AFM clusters and HFC,which exhibits predominantly atlow HFC range, while the competition between FM clusters and HFC, which becomes predominant at high HFC range.

Unravelling the onset of the exchange bias effect in Ni(core)@NiO(shell) nanoparticles embedded in a mesoporous carbon matrix

2015 ◽  
Vol 3 (22) ◽  
pp. 5674-5682 ◽  
Author(s):  
Natalia Rinaldi-Montes ◽  
Pedro Gorria ◽  
David Martínez-Blanco ◽  
Zakariae Amghouz ◽  
Antonio B. Fuertes ◽  
...  
Keyword(s):  
Exchange Bias ◽  
Mesoporous Carbon ◽  
Carbon Matrix ◽  
Nio Nanoparticles ◽  
Bias Effect ◽  
Shell Nanoparticles ◽  
Exchange Bias Effect

The onset of the exchange bias effect in air-oxidized Ni@NiO nanoparticles is mainly driven by the properties of the magnetically disordered NiO shell, and less dependent on the size of the metallic Ni core.

Magnetocaloric properties and exchange bias effect in Al for Sn substituted Ni48Mn39.5Sn12.5 Heusler alloy ribbons

2014 ◽  
Vol 358-359 ◽  
pp. 142-148 ◽  
Author(s):  
Paweł Czaja ◽  
Wojciech Maziarz ◽  
Janusz Przewoźnik ◽  
Czesław Kapusta ◽  
Lukasz Hawelek ◽  
...  
Keyword(s):  
Exchange Bias ◽  
Heusler Alloy ◽  
Bias Effect ◽  
Exchange Bias Effect ◽  
Magnetocaloric Properties
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