Published July 2003 | Version v1
Journal article Metadata-only

Magnetic and magnetic-lattice dynamics in GdMn2O5

Creators

  • 1. RAN, Fiziko-Tekhnicheskij Inst. im. A.F. Ioffe, Sankt-Peterburg (Russian Federation)

Description

The dynamics of the RMn2O5 (R = Eu and Gd) crystals, characterized by the magnetic and ferroelectric long-range order with the close transition temperatures T ≅ 36 K and T ≅ 30 K for the crystals with the R = Eu and Gd is studied within the frequency range of 20-300 GHz and temperature interval of 5-50 K correspondingly. The mixed magnetic-lattice excitations were identified in the GdMn2O5, which were most intensive near the transition temperature T ≅ 30 K on the frequencies close to the frequencies of the antiferromagnetic resonance of the Mn-subsystem. The ferromagnetic resonance of the Gd-subsystem was observed in the external magnetic field in the GdMn2O5 along with the antiferromagnetic resonance of the Mn-subsystem. No similar dynamics was observed in the EuMn2O5

Abstract (Russian)

В диапазоне частот 20-300 ГГц и интервале температур 5-50 К исследована динамика магнитоэлектрических кристаллов RMn2O5 (R = Eu и Gd), обладающих магнитным и ферроэлектрическим дальним порядком с близкими температурами перехода T ≅ 36 K и T ≅ 30 K для кристаллов с R = Eu и Gd, соответственно. В GdMn2O5 были обнаружены смешанные магнито-решеточные возбуждения, которые были наиболее интенсивны вблизи температуры перехода T ≅ 30 K на частотах, близких к частотам антиферромагнитного резонанса Mn-подсистемы. Во внешнем магнитном поле в GdMn2O5 наряду с антиферромагнитным резонансом Mn-подсистемы наблюдался также и ферромагнитный резонанс Gd-подсистемы. В EuMn2O5 подобной динамики не наблюдалось

Additional details

Additional titles

Original title (Russian)
Магнитная и магнито-решеточная динамика в GdMn

Publishing Information

Journal Title
Pis'ma v Zhurnal Ehksperimental'noj i Teoreticheskoj Fiziki
Journal Volume
78
Journal Issue
1-2
Journal Page Range
p. 99-102
ISSN
0370-274X
CODEN
PZETAB

INIS

Country of Publication
Russian Federation
Country of Input or Organization
Russian Federation
INIS RN
36009182
Subject category
S36: MATERIALS SCIENCE;
Descriptors DEI
CURIE POINT; EUROPIUM OXIDES; GADOLINIUM OXIDES; LATTICE VIBRATIONS; MAGNETIC FIELDS; MAGNETIC RESONANCE; MAGNETIC SUSCEPTIBILITY; MANGANESE OXIDES; MONOCRYSTALS; NEEL TEMPERATURE; PERMITTIVITY; TEMPERATURE DEPENDENCE; TEMPERATURE RANGE 0000-0013 K; TEMPERATURE RANGE 0013-0065 K
Descriptors DEC
CHALCOGENIDES; CRYSTALS; DIELECTRIC PROPERTIES; ELECTRICAL PROPERTIES; EUROPIUM COMPOUNDS; GADOLINIUM COMPOUNDS; MAGNETIC PROPERTIES; MANGANESE COMPOUNDS; OXIDES; OXYGEN COMPOUNDS; PHYSICAL PROPERTIES; RARE EARTH COMPOUNDS; RESONANCE; TEMPERATURE RANGE; THERMODYNAMIC PROPERTIES; TRANSITION ELEMENT COMPOUNDS; TRANSITION TEMPERATURE

Optional Information

Notes
10 refs., 4 figs.