Search

Your search keyword '"A.A. Mukhin"' showing total 3 results
Start Over Author "A.A. Mukhin" Language english
3 results on '"A.A. Mukhin"'

1. Quasioptical study of antiferromagnetic resonance in YFeO3 at submillimeter wavelength under high pulsed magnetic fields

Author

A.A., Mukhin, An., Lobanov, Goiran, Michel, Léotin, Jean, Laboratoire National des Champs Magnétiques Pulsés (LNCMP), Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS), Centre National de la Recherche Scientifique (CNRS)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), and Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)

Subjects
[PHYS.COND.CM-S]Physics [physics]/Condensed Matter [cond-mat]/Superconductivity [cond-mat.supr-con], ComputingMilieux_MISCELLANEOUS
Abstract

International audience

Published
2008

2. Effect of weak Sr doping on antiferromagnetic resonance in La1-xSrxMnO3

Author

V. Yu. Ivanov, Andrei Pimenov, Alois Loidl, V. D. Travkin, S.P. Lebedev, A.A. Mukhin, and A. M. Balbashov

Subjects
Nuclear magnetic resonance, Materials science, Condensed matter physics, Magnetic structure, Doping, Resonance, Antiferromagnetism, Electrical and Electronic Engineering, Condensed Matter Physics, Electronic, Optical and Magnetic Materials
Abstract

Antiferromagnetic resonance (AFMR) have been studied in La1−xSrxMnO3 single crystals (0 25 cm −1 at T=3– 300 K . Two AFMR modes, quasiferromagnetic (F) and quasiantiferromagnetic (AF) were observed and studied below TN. A strong decrease of the resonance frequency of the F-mode was revealed with increasing x, while the frequency of the AF-mode is only slightly decreased (20%). The observed behaviour of the AFMR modes corresponds to a canted magnetic structure and its evolution with increasing x.

Published
2001

3. The phase diagram and optical properties of La1-xSrxMnO3 for x<=0.2

Author

A.A. Mukhin, Peter Lunkenheimer, V. Yu. Ivanov, Ch. Hartinger, M. Paraskevopoulos, A. M. Balbashov, Franz Mayr, Alois Loidl, Joachim Hemberger, and Andrei Pimenov

Subjects
Materials science, Condensed matter physics, Magnetoresistance, Jahn–Teller effect, Condensed Matter Physics, Polaron, Magnetic susceptibility, Electronic, Optical and Magnetic Materials, Condensed Matter::Materials Science, Superexchange, Phase (matter), Antiferromagnetism, Condensed Matter::Strongly Correlated Electrons, ddc:530, Phase diagram
Abstract

We report on detailed susceptibility, magnetization and magnetoresistance studies in La1−xSrxMnO3 for x⩽0.2. We arrive at a phase diagram which shows a ferromagnetic and insulating ground state for 0.1⩽x⩽0.15, followed by a canted antiferromagnetic phase at higher temperatures. The ferromagnetic transition is strongly coupled to a structural transition from a Jahn–Teller distorted phase to a pseudocubic orthorhombic phase, and is accompanied by the appearance of large positive magnetoresistance effects. We interpret the rich phase diagram close to x= 1 8 in terms of orbital ordering, due to an interplay of superexchange interactions and Jahn–Teller distortions. In addition, we report on the temperature dependence of phonon spectra and on optical conductivities. The temperature dependence of bending and stretching modes clearly indicate the structural and magnetic-phase transitions. The optical conductivities are explained in terms of small polaron absorption.

Published
2000

Catalog

Books, media, physical & digital resources
See catalog results