TY - JOUR
T1 - Colossal magnetization and giant coercivity in ion-implanted (Nb and Co) MoS2 crystals
AU - Ahmed, Sohail
AU - Cui, Xiang-Yuan Carl
AU - Ding, Xiang
AU - Murmu, Peter Paul
AU - Bao, Nina
AU - Geng, Xun
AU - Xi, Shibo
AU - Liu, Rong
AU - Kennedy, John
AU - Wu, Tom
AU - Wang, Lan
AU - Suzuki, Kiyonori
AU - Ding, Jun
AU - Chu, Xueze
AU - Indirathankam, Sathish Russellraj Clastinrusselraj
AU - Peng, Mingli
AU - Vinu, Ajayan
AU - Ringer, Simon Peter
AU - Yi, Jiabao
PY - 2020
Y1 - 2020
N2 - Colossal saturation magnetization and giant coercivity are realized in MoS2 single crystals doped with Nb and/or Co using an ion implantation method. Magnetic measurements have demonstrated that codoping with 2 at % Nb and 4 at % Co invoked a "giant"coercivity, as high as 9 kOe at 100 K. Doping solely with 5 at % Nb induces a "colossal"magnetization of 1800 emu/cm3 at 5 K, which is higher than that of metallic Co. The high magnetization is due to the formation of Nb-rich defect complexes, as confirmed by first-principles calculations. It is proposed that the high coercivity is due to the combined effects of strong directional exchange coupling induced by the Nb and Co doping and pinning effects from defects within the layered structure. This high magnetization mechanism is also applicable to 2D materials with bilayers or few layers of thickness, as indicated by first-principles calculations. Hence, this work opens a potential pathway for the development of 2D high-performance magnetic materials.
AB - Colossal saturation magnetization and giant coercivity are realized in MoS2 single crystals doped with Nb and/or Co using an ion implantation method. Magnetic measurements have demonstrated that codoping with 2 at % Nb and 4 at % Co invoked a "giant"coercivity, as high as 9 kOe at 100 K. Doping solely with 5 at % Nb induces a "colossal"magnetization of 1800 emu/cm3 at 5 K, which is higher than that of metallic Co. The high magnetization is due to the formation of Nb-rich defect complexes, as confirmed by first-principles calculations. It is proposed that the high coercivity is due to the combined effects of strong directional exchange coupling induced by the Nb and Co doping and pinning effects from defects within the layered structure. This high magnetization mechanism is also applicable to 2D materials with bilayers or few layers of thickness, as indicated by first-principles calculations. Hence, this work opens a potential pathway for the development of 2D high-performance magnetic materials.
UR - https://hdl.handle.net/1959.7/uws:61109
U2 - 10.1021/acsami.0c18150
DO - 10.1021/acsami.0c18150
M3 - Article
SN - 1944-8244
VL - 12
SP - 58140
EP - 58148
JO - ACS Applied Materials and Interfaces
JF - ACS Applied Materials and Interfaces
IS - 52
ER -