scholarly journals Temperature-Driven Spin Reorientation Transition in CoPt/AlN Multilayer Films

2012 ◽  
Vol 2012 ◽  
pp. 1-7
Author(s):  
Wupeng Cai ◽  
Shinji Muraishi ◽  
Ji Shi ◽  
Yoshio Nakamura ◽  
Wei Liu ◽  
...  
Keyword(s):  
Temperature Dependence ◽  
Mean Field ◽  
Multilayer Films ◽  
Spin Reorientation ◽  
Strong Temperature Dependence ◽  
Mean Field Model ◽  
Spin Reorientation Transition ◽  
Magnetoelastic Effect ◽  
Out Of Plane ◽  
Interface Anisotropy

Spin reorientation transition phenomena from out-of-plane to in-plane direction with increasing temperature are observed for the 500°C annealed CoPt/AlN multilayer films with different CoPt layer thicknesses. CoPt-AlN interface and volume anisotropy contributions, favoring out-of-plane and in-plane magnetization, respectively, are separately determined at various temperatures. Interface anisotropy exhibits much stronger temperature dependence than volume contribution, hence the temperature-driven spin reorientation transition occurs. Interface anisotropy in this work consists of Néel interface anisotropy and magnetoelastic effect. Magnetoelastic effect degrades rapidly and changes its sign from positive to negative above 200°C, because of the involvement of stress state in CoPt films with temperature. By contrast, Néel interface anisotropy decays slowly, estimated from a Néel mean field model. Thus, the strong temperature dependence of CoPt-AlN interface anisotropy is dominated by the change of magnetoelastic effect.

scholarly journals Non-monotonic magnetic anisotropy behavior as a function of adsorbate coverage in Fe ultrathin films near the spin reorientation transition

2021 ◽  
Author(s):  
A. Quesada ◽  
G. Chen ◽  
A. T. N'Diaye ◽  
P. Wang ◽  
Y. Z. Wu ◽  
...  
Keyword(s):  
Carbon Monoxide ◽  
Magnetic Anisotropy ◽  
Ultrathin Films ◽  
Co Adsorption ◽  
Spin Reorientation ◽  
Spin Reorientation Transition ◽  
Out Of Plane

Carbon monoxide (CO) adsorption on ultrathin fcc Fe films is known to result in the rotation of magnetization from out-of-plane to in-plane.

Magnetic Domain Structure and Spin Reorientation Transition in the System Co/Au/W(110)

1997 ◽  
Vol 475 ◽  
Author(s):  
T. Duden ◽  
E. Bauer
Keyword(s):  
Thin Films ◽  
Domain Structure ◽  
Time Resolution ◽  
Magnetic Domain ◽  
Spin Reorientation ◽  
High Time Resolution ◽  
Spin Reorientation Transition ◽  
In Situ Experiments ◽  
Out Of Plane

ABSTRACTUltrathin epitaxial Co layers grown on Au(111) show strong perpendicular magnetic aniso-tropy resulting in out-of-plane magnetization in thin films. With increasing Co thickness the increasing contribution of the shape anisotropy leads to a reorientation transition of the magnetization which has already been subject of many other studies. In the dynamic in-situ experiments reported here bulk Au(111) is replaced by epitaxially grown Au(111)/W(110). The high time resolution (0.05 ML Co deposition per acquisition cycle) allows to extract several mechanisms which occur during the spin reorientation transition.

Spin reorientation transition due to thickness ratio variation in EuBi2Fe5O12/Y3Fe5O12 multilayer films—ferrimagnetic resonance studies

1998 ◽  
Vol 83 (7) ◽  
pp. 3750-3753
Author(s):  
S. E. Lofland ◽  
S. M. Bhagat ◽  
V. V. Srinivasu ◽  
R. Ramesh ◽  
B. M. Simion ◽  
...  
Keyword(s):  
Multilayer Films ◽  
Thickness Ratio ◽  
Spin Reorientation ◽  
Spin Reorientation Transition ◽  
Ratio Variation

Calculation of the tilt angle and susceptibility for the α–β transition in quartz using a mean field model

2017 ◽  
Vol 31 (09) ◽  
pp. 1750092 ◽  
Author(s):  
H. Yurtseven ◽  
U. Ipekoğlu ◽  
S. Ateş
Keyword(s):  
Experimental Data ◽  
Phase Transition ◽  
Temperature Dependence ◽  
Tilt Angle ◽  
Phenomenological Model ◽  
Order Parameter ◽  
Field Model ◽  
Mean Field ◽  
Mean Field Model ◽  
The Mean

Tilt angle (order parameter) and the susceptibility are calculated as a function of temperature for the [Formula: see text]–[Formula: see text] transition in quartz using a Landau phenomenological model. The tilt angle as obtained from the model is fitted to the experimental data from the literature and the temperature dependence of the tilt angle susceptibility is predicted close to the [Formula: see text]–[Formula: see text] transition in quartz. Our results show that the mean field model explains the observed behavior of the [Formula: see text]–[Formula: see text] phase transition in quartz adequately and it can be applied to some related materials.

The Spin-Reorientation Transition in a Nanocrystalline Nd-Ho-Fe-Co-B Alloy and its Influence on the Hysteresis Loops

2010 ◽  
Vol 168-169 ◽  
pp. 396-399 ◽  
Author(s):  
A.S. Volegov ◽  
Nikolai V. Kudrevatykh ◽  
Irina S. Tereshina ◽  
D.S. Neznakhin ◽  
Y.A. Sabiryanova
Keyword(s):  
Temperature Dependence ◽  
Wide Temperature Range ◽  
Hysteresis Loops ◽  
Spin Reorientation ◽  
Considerable Decrease ◽  
Temperature Range ◽  
Spin Reorientation Transition ◽  
Cone Type

The temperature dependence of coercivity (Hc) of a nanocrystalline (Nd0.55Ho0.45)2.7(Fe0.8Co0.2)14B1.2 alloy in a wide temperature range, including the spin reorientation (SR) transition interval, has been investigated. A considerable decrease in the Hc for the SR in the range 150–4.2 K was detected and interpreted as being an effect caused by the anisotropy change of the 2-14-1 phase nanograins, i.e., from the uniaxial to the easy-cone type.

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