scholarly journals Strain-induced modulation of temperature characteristics in ferrimagnetic Tb–Fe films

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Shinya Ota ◽  
Pham Van Thach ◽  
Hiroyuki Awano ◽  
Akira Ando ◽  
Kentaro Toyoki ◽  
...  
Keyword(s):  
Field Theory ◽  
Magnetic Moment ◽  
Exchange Coupling ◽  
Tensile Strain ◽  
Room Temperature ◽  
Magnetic Circular Dichroism ◽  
Flexible Substrate ◽  
Molecular Field ◽  
Compensation Temperature ◽  
X Ray

AbstractThis study investigates the effect of strain on the compensation temperature of ferrimagnetic Tb–Fe films formed on a flexible substrate. The compensation temperature is determined by the anomalous Hall measurement, and an application of 1.2% tensile strain reduces the compensation temperature by 12 K. X-ray magnetic circular dichroism reveals that approximately 5% of Fe magnetic moment and approximately 1% of Tb magnetic moment are reduced by an application of 0.9% tensile strain at the room temperature. To understand the greater reduction in Fe magnetization compared with that in Tb and the compensation temperature reduction simultaneously, a model applying molecular field theory is analyzed. Changes in three types of exchange coupling between Fe and Tb atoms are speculated to be caused by the strain.

Irradiation induced ferromagnetism at room temperature in TiO2 thin films: X-ray magnetic circular dichroism characterizations

2011 ◽  
Vol 98 (19) ◽  
pp. 192512 ◽  
Author(s):  
Hardeep Thakur ◽  
P. Thakur ◽  
Ravi Kumar ◽  
N. B. Brookes ◽  
K. K. Sharma ◽  
...  
Keyword(s):  
Thin Films ◽  
Circular Dichroism ◽  
Room Temperature ◽  
Magnetic Circular Dichroism ◽  
Tio2 Thin Films ◽  
X Ray ◽  
Circular Dichroïsm

scholarly journals Direct evidence of Ni magnetic moment in TbNi2Mn—X-ray magnetic circular dichroism

2014 ◽  
Vol 370 ◽  
pp. 32-36 ◽  
Author(s):  
D.H. Yu ◽  
Meng-Jie Huang ◽  
J.L. Wang ◽  
Hui-Chia Su ◽  
Hong-Ji Lin ◽  
...  
Keyword(s):  
Circular Dichroism ◽  
Magnetic Moment ◽  
Direct Evidence ◽  
Magnetic Circular Dichroism ◽  
X Ray ◽  
Circular Dichroïsm

scholarly journals Simulation Study of Helium Effect on the Microstructure of Nanocrystalline Body-Centered Cubic Iron

Materials ◽  
2018 ◽  
Vol 12 (1) ◽  
pp. 91 ◽  
Author(s):  
Chunping Xu ◽  
Wenjun Wang
Keyword(s):  
Lattice Constant ◽  
Tensile Strain ◽  
Room Temperature ◽  
Md Simulation ◽  
Uniaxial Tensile ◽  
Body Centered Cubic ◽  
X Ray Diffraction ◽  
X Ray ◽  
Swelling Rate ◽  
Simulation Results

Helium (He) effect on the microstructure of nanocrystalline body-centered cubic iron (BCC-Fe) was studied through Molecular Dynamics (MD) simulation and simulated X-ray Diffraction (XRD). The crack generation and the change of lattice constant were investigated under a uniaxial tensile strain at room temperature to explore the roles of He concentration and distribution played in the degradation of mechanical properties. The simulation results show that the expansion of the lattice constant decreases and the swelling rate increases while the He in the BCC region diffuses into the grain boundary (GB) region. The mechanical property of nanocrystalline BCC-Fe shows He concentration and distribution dependence, and the existence of He in GB is found to benefit the generation and growth of cracks and to affect the strength of GB during loading. It is observed that the reduction of tensile stress contributed by GB He is more obvious than that contributed by grain interior He.

Sign in / Sign up

Export Citation Format

Share Document