Instability of magnons in two-dimensional antiferromagnets at high magnetic fields

Masuda, Takatsugu*; Kitaoka, Shuji*; Takamizawa, Satoshi*; Metoki, Naoto ; Kaneko, Koji ; Rule, K. C.*; Kiefer, K.*; Manaka, Hiroshi*; Nojiri, Hiroyuki*

Spin dynamics of the square lattice Heisenberg antiferromagnet, BaMnGeO, is studied by a combination of bulk measurements, neutron diffraction, and inelastic neutron-scattering techniques. Easy plane type antiferromagnetic order is identified at T4.0 K. The exchange interactions are estimated as = 27.8(3) eV and = 1.0(1) eV, and the saturation field $_{rm C}$ is 9.75 T. Magnetic excitation measurements with high experimental resolution setup by triple axis neutron spectrometer reveals the instability of one magnon excitation in the field range of 0.7 $_{rm C}$ $_sim^{<}$ $_sim^{<}$ 0.85 $_{rm C}$ .

Language	:	English
Journal	:	Physical Review B
Volume	:	81
Number	:	10
Pages	:	p.100402_1 - 100402_4
Publication Year/Month	:	2010/00
Meeting title	:
Held date	:
Location (city)	:
Location (country)	:
Patent information	:
PDF	:
Paper URL	:	https://doi.org/10.1103/PhysRevB.81.100402
DOI for research data	:
Keywords	:	no keyword
Research Facility	:	JRR-3M(研究炉3)
Press Release	:
Article of JAEA R&D Review	:
Cooperating Institute	:

Accesses	:	- Accesses
Web of Science® Times Cited Count	:	Times Cited Count： If you would like to get the latest times cited, please access the Web of Science®. http://www.webofknowledge.com/wos
InCites™	:	Percentile:81.37 Category:Materials Science, Multidisciplinary
Altmetrics	:

Registration No. : AA20110730
JAEA Abstracts No. :
Paper Submission No. : 10646

[CLARIVATE ANALYTICS], [WEB OF SCIENCE], [HIGHLY CITED PAPER & CUP LOGO] and [HOT PAPER & FIRE LOGO] are trademarks of Clarivate Analytics, and/or its affiliated company or companies, and used herein by permission and/or license.