Magnetic order in semiconducting, ferromagnetic Ga1-xMnxAs
(2004) In Semiconductor Science and Technology 19(4). p.492-493- Abstract
- Magnetic resonance studies allow us to distinguish paramagnetic, ferromagnetic and ferrimagnetic phases in Ga1-xMnxAs. The transition from ferromagnet to ferrimagnet is correlated with a metal to insulator transition. The analysis of spin wave resonance spectra, which occur in the ferrimagnetic phase, allows us to estimate the magnitude and the distance dependence of exchange coupling. The experimentally evaluated long range of exchange causes an effective averaging of the fluctuation of exchange interactions. As a consequence, in the semimetallic phase both spin subsystems coherently precess forming the ferrimagnetic structure. In the insulating phase, fluctuations of the local exchange field lead to a fast decoherence of the carrier... (More)
- Magnetic resonance studies allow us to distinguish paramagnetic, ferromagnetic and ferrimagnetic phases in Ga1-xMnxAs. The transition from ferromagnet to ferrimagnet is correlated with a metal to insulator transition. The analysis of spin wave resonance spectra, which occur in the ferrimagnetic phase, allows us to estimate the magnitude and the distance dependence of exchange coupling. The experimentally evaluated long range of exchange causes an effective averaging of the fluctuation of exchange interactions. As a consequence, in the semimetallic phase both spin subsystems coherently precess forming the ferrimagnetic structure. In the insulating phase, fluctuations of the local exchange field lead to a fast decoherence of the carrier spins and only the localized Mn spins form the ferromagnetic moment. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/281093
- author
- Fedorych, OM ; Wilamowski, Z ; Potemski, M ; Byszewski, M and Sadowski, Janusz LU
- organization
- publishing date
- 2004
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Semiconductor Science and Technology
- volume
- 19
- issue
- 4
- pages
- 492 - 493
- publisher
- IOP Publishing
- external identifiers
-
- wos:000220860700163
- scopus:1942516291
- ISSN
- 0268-1242
- DOI
- 10.1088/0268-1242/19/4/162
- language
- English
- LU publication?
- yes
- id
- d0041206-b374-48da-8f7f-e1b0ef4ea3b2 (old id 281093)
- date added to LUP
- 2016-04-01 15:26:45
- date last changed
- 2022-01-28 05:21:41
@article{d0041206-b374-48da-8f7f-e1b0ef4ea3b2,
abstract = {{Magnetic resonance studies allow us to distinguish paramagnetic, ferromagnetic and ferrimagnetic phases in Ga1-xMnxAs. The transition from ferromagnet to ferrimagnet is correlated with a metal to insulator transition. The analysis of spin wave resonance spectra, which occur in the ferrimagnetic phase, allows us to estimate the magnitude and the distance dependence of exchange coupling. The experimentally evaluated long range of exchange causes an effective averaging of the fluctuation of exchange interactions. As a consequence, in the semimetallic phase both spin subsystems coherently precess forming the ferrimagnetic structure. In the insulating phase, fluctuations of the local exchange field lead to a fast decoherence of the carrier spins and only the localized Mn spins form the ferromagnetic moment.}},
author = {{Fedorych, OM and Wilamowski, Z and Potemski, M and Byszewski, M and Sadowski, Janusz}},
issn = {{0268-1242}},
language = {{eng}},
number = {{4}},
pages = {{492--493}},
publisher = {{IOP Publishing}},
series = {{Semiconductor Science and Technology}},
title = {{Magnetic order in semiconducting, ferromagnetic Ga1-xMnxAs}},
url = {{http://dx.doi.org/10.1088/0268-1242/19/4/162}},
doi = {{10.1088/0268-1242/19/4/162}},
volume = {{19}},
year = {{2004}},
}