Anomalous Galvanomagnetic Effects due to Spontaneous Spin Polarization of Electrons in Crystal with Low Concentration of 3d-Transition Element Impurities

2015 ◽  
Vol 233-234 ◽  
pp. 456-459 ◽  
Author(s):  
A.T. Lonchakov ◽  
Vsevolod I. Okulov ◽  
E.A. Pamyatnykh ◽  
T.E. Govorkova ◽  
M.A. Andriichuk ◽  
...  

The results of experimental observations at room temperature of anomalous Hall effect associated with existence of a spontaneous spin polarization of conduction electrons in mercury selenide crystals doped with chromium and vanadium in the concentration range from 1·1018 to 1·1019 sm-3 are reported. Comparison of the experimental data together with the previously reported results related to crystals with iron, cobalt and nickel impurities shows that the relative contribution to the anomalous Hall effect is maximal for vanadium impurity (≈ 13%) and minimal for iron impurity (≈ 5%). Also, transverse magnetoresistance with a characteristic dependence on the magnetic field strength, on which an unusual hysteresis in the field dependence was observed, was found in investigated crystals at room temperature. Theoretical interpretation of the observed effects is developed based on the concepts of thermodynamic nature of anomalous galvanomagnetic phenomena in electron systems with spontaneous spin polarization.

2022 ◽  
Vol 64 (1) ◽  
pp. 60
Author(s):  
Т.Е. Говоркова ◽  
В.И. Окулов

The given work is devoted to the experimental proof of existing the spontaneous spin polarization of the donor electron system of 3d-transition element impurity atoms of low concentration (<1 at.%) in a mercury selenide crystal. For this purpose there have been measured the dependences of the magnetization on the magnetic field strength. As a result of the analysis of the obtained dependences, there were extracted the impurity contributions, which are described by the magnetization curves typical of the ferromagnets, and by the magnetic parameters conforming to the spontaneous magnetism of the systems under study, which are unambiguously related to the donor conduction electrons of the outer d-shells of impurity atoms. By its nature, according to the developed theoretical concepts, the spontaneous spin polarization manifests itself in exchange interaction, taking place in hybridizing the electronic states of the impurity atom and the conduction band ones of the crystal.


2013 ◽  
Vol 102 (20) ◽  
pp. 202408 ◽  
Author(s):  
J. L. Yu ◽  
Y. H. Chen ◽  
Y. Liu ◽  
C. Y. Jiang ◽  
H. Ma ◽  
...  

2020 ◽  
Vol 117 (22) ◽  
pp. 222404
Author(s):  
Yunfeng You ◽  
Hua Bai ◽  
Xianzhe Chen ◽  
Yongjian Zhou ◽  
Xiaofeng Zhou ◽  
...  

2011 ◽  
Vol 84 (7) ◽  
Author(s):  
B. A. Aronzon ◽  
V. V. Rylkov ◽  
S. N. Nikolaev ◽  
V. V. Tugushev ◽  
S. Caprara ◽  
...  

Author(s):  
Takuya Matsuda ◽  
Natsuki Kanda ◽  
Tomoya Higo ◽  
N. P. Armitage ◽  
Satoru Nakatsuji ◽  
...  

2008 ◽  
Vol 103 (7) ◽  
pp. 07D114 ◽  
Author(s):  
K. Ueno ◽  
T. Fukumura ◽  
H. Toyosaki ◽  
M. Nakano ◽  
T. Yamasaki ◽  
...  

2008 ◽  
Vol 112 (6) ◽  
pp. 1837-1841 ◽  
Author(s):  
Zhigang Li ◽  
Weiping Cai ◽  
Shikuan Yang ◽  
Guotao Duan ◽  
Ran Ang

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