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.

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 Giant Vertical Magnetization Shift Caused by Field-Induced Ferromagnetic Spin Reconfiguration in Ni50Mn36Ga14 Alloy

Materials ◽  
2020 ◽  
Vol 13 (21) ◽  
pp. 4701
Author(s):  
Fanghua Tian ◽  
Yin Zhang ◽  
Chao Zhou ◽  
Qizhong Zhao ◽  
Zhonghai Yu ◽  
...  
Keyword(s):  
Temperature Dependence ◽  
Field Dependence ◽  
Exchange Bias ◽  
Training Effect ◽  
Bias Effect ◽  
Exchange Bias Effect ◽  
Recording Technology ◽  
Practical Applications ◽  
Ultrahigh Density ◽  
And Training

Vertical magnetization shift (VMS) is a special type of exchange bias effect that may lead to a revolution in future ultrahigh-density magnetic recording technology. However, there are very few reports focusing on the performance of VMS due to the unclear mechanism. In this paper, a giant vertical magnetization shift (ME) of 6.34 emu/g is reported in the Ni50Mn36Ga14 alloy. The VMS can be attributed to small ferromagnetic ordered regions formed by spin reconfiguration after field cooling, which are embedded in an antiferromagnetic matrix. The strong cooling-field dependence, temperature dependence, and training effect all corroborate the presence of spin reconfiguration and its role in the VMS. This work can enrich VMS research and increase its potential in practical applications as well.

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.

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
Sign in / Sign up

Export Citation Format

Share Document