Bose–Einstein condensation and superfluidity of magnons in yttrium iron garnet films

2017 ◽  
Vol 50 (14) ◽  
pp. 143002 ◽  
Author(s):  
Chen Sun ◽  
Thomas Nattermann ◽  
Valery L Pokrovsky
Keyword(s):  
Yttrium Iron Garnet ◽  
Einstein Condensation ◽  
Yttrium Iron ◽  
Bose Einstein Condensation ◽  
Garnet Films ◽  
Iron Garnet ◽  
Bose Einstein

scholarly journals Bose—Einstein Condensation and Spin Superfluidity of Magnons in a Perpendicularly Magnetized Yttrium Iron Garnet Film

JETP Letters ◽  
2020 ◽  
Vol 112 (5) ◽  
pp. 299-304
Author(s):  
P. M. Vetoshko ◽  
G. A. Knyazev ◽  
A. N. Kuzmichev ◽  
A. A. Kholin ◽  
V. I. Belotelov ◽  
...  
Keyword(s):  
Yttrium Iron Garnet ◽  
Einstein Condensation ◽  
Yttrium Iron ◽  
Garnet Film ◽  
Bose Einstein Condensation ◽  
Yttrium Iron Garnet Film ◽  
Iron Garnet ◽  
Bose Einstein ◽  
Spin Superfluidity ◽  
Iron Garnet Film

Features of the Interaction of a Magnon Bose—Einstein Condensate with Acoustic Modes in Yttrium Iron Garnet Films

JETP Letters ◽  
2020 ◽  
Vol 112 (11) ◽  
pp. 710-714
Author(s):  
A. N. Kuzmichev ◽  
P. M. Vetoshko ◽  
G. A. Knyazev ◽  
V. I. Belotelov ◽  
Yu. M. Bunkov
Keyword(s):  
Yttrium Iron Garnet ◽  
Einstein Condensate ◽  
Yttrium Iron ◽  
Acoustic Modes ◽  
Garnet Films ◽  
Bose Einstein Condensate ◽  
Iron Garnet ◽  
Bose Einstein

Bose–Einstein condensation of spin wave quanta at room temperature

2011 ◽  
Vol 369 (1951) ◽  
pp. 3575-3587 ◽  
Author(s):  
O. Dzyapko ◽  
V. E. Demidov ◽  
G. A. Melkov ◽  
S. O. Demokritov
Keyword(s):  
Room Temperature ◽  
Chemical Potential ◽  
Spin Waves ◽  
Einstein Condensation ◽  
Quasi Equilibrium ◽  
Magnetic Media ◽  
Bose Einstein Condensation ◽  
Garnet Films ◽  
Iron Garnet ◽  
Bose Einstein

Spin waves are delocalized excitations of magnetic media that mainly determine their magnetic dynamics and thermodynamics at temperatures far below the critical one. The quantum-mechanical counterparts of spin waves are magnons, which can be considered as a gas of weakly interacting bosonic quasi-particles. Here, we discuss the room-temperature kinetics and thermodynamics of the magnon gas in yttrium iron garnet films driven by parametric microwave pumping. We show that for high enough pumping powers, the thermalization of the driven gas results in a quasi-equilibrium state described by Bose–Einstein statistics with a non-zero chemical potential. Further increases of the pumping power cause a Bose–Einstein condensation documented by an observation of the magnon accumulation at the lowest energy level. Using the sensitivity of the Brillouin light scattering spectroscopy to the degree of coherence of the scattering magnons, we confirm the spontaneous emergence of coherence of the magnons accumulated at the bottom of the spectrum, occurring if their density exceeds a critical value.

Observation of parametric amplification of propagating dipole-exchange spin waves in yttrium iron garnet films

JETP Letters ◽  
1996 ◽  
Vol 64 (3) ◽  
pp. 171-176 ◽  
Author(s):  
B. A. Kalinikos ◽  
N. G. Kovshikov ◽  
M. P. Kostylev ◽  
H. Benner
Keyword(s):  
Yttrium Iron Garnet ◽  
Spin Waves ◽  
Parametric Amplification ◽  
Yttrium Iron ◽  
Garnet Films ◽  
Iron Garnet ◽  
Dipole Exchange

scholarly journals Double accumulation and anisotropic transport of magnetoelastic bosons in yttrium iron garnet films

2021 ◽  
Vol 104 (1) ◽  
Author(s):  
Pascal Frey ◽  
Dmytro A. Bozhko ◽  
Victor S. L'vov ◽  
Burkard Hillebrands ◽  
Alexander A. Serga
Keyword(s):  
Yttrium Iron Garnet ◽  
Yttrium Iron ◽  
Garnet Films ◽  
Anisotropic Transport ◽  
Iron Garnet

Ferromagnetic relaxation in LPE‐grown Eu‐Ga substituted yttrium iron garnet films

1986 ◽  
Vol 60 (10) ◽  
pp. 3656-3660 ◽  
Author(s):  
B. Uma Maheshwar Rao ◽  
P. Mukhopadhyay ◽  
C. M. Srivastava
Keyword(s):  
Yttrium Iron Garnet ◽  
Yttrium Iron ◽  
Garnet Films ◽  
Iron Garnet ◽  
Ferromagnetic Relaxation
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