Helimagnetism and competition of exchange interactions in bulk giant magnetoresistance alloys based on Mn Au2

L. Udvardi, S. Khmelevskyi, L. Szunyogh, P. Mohn, P. Weinberger

Research output: Contribution to journalArticle

18 Citations (Scopus)

Abstract

By using the generalized perturbation method within the screened Korringa-Kohn-Rostoker formalism we calculate magnetic exchange interactions in the helimagnetic bulk Mn Au2 compound upon alloying Mn with Fe and Cr. The obtained interactions reproduce well the results of neutron diffraction experiments concerning the periodicity of the helix in Mn Au2 and its weakening with Fe substitution thus supporting the conventional interpretation of a metamagnet-ferromagnet transitions due to external fields. In the case of Mn1-x Crx Au2 alloys our results reveal that the experimentally observed magnetization process follows a completely different scenario, predicted theoretically a few decades ago for nearly orthogonal helimagnetics.

Original languageEnglish
Article number104446
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume73
Issue number10
DOIs
Publication statusPublished - 2006

Fingerprint

Giant magnetoresistance
Exchange interactions
Neutron diffraction
Alloying
Magnetization
Substitution reactions
helices
alloying
neutron diffraction
periodic variations
Experiments
interactions
substitutes
formalism
perturbation
magnetization

ASJC Scopus subject areas

  • Condensed Matter Physics

Cite this

Helimagnetism and competition of exchange interactions in bulk giant magnetoresistance alloys based on Mn Au2. / Udvardi, L.; Khmelevskyi, S.; Szunyogh, L.; Mohn, P.; Weinberger, P.

In: Physical Review B - Condensed Matter and Materials Physics, Vol. 73, No. 10, 104446, 2006.

Research output: Contribution to journalArticle

@article{9419100dbc4b4b3e8eac501a47308ad1,
title = "Helimagnetism and competition of exchange interactions in bulk giant magnetoresistance alloys based on Mn Au2",
abstract = "By using the generalized perturbation method within the screened Korringa-Kohn-Rostoker formalism we calculate magnetic exchange interactions in the helimagnetic bulk Mn Au2 compound upon alloying Mn with Fe and Cr. The obtained interactions reproduce well the results of neutron diffraction experiments concerning the periodicity of the helix in Mn Au2 and its weakening with Fe substitution thus supporting the conventional interpretation of a metamagnet-ferromagnet transitions due to external fields. In the case of Mn1-x Crx Au2 alloys our results reveal that the experimentally observed magnetization process follows a completely different scenario, predicted theoretically a few decades ago for nearly orthogonal helimagnetics.",
author = "L. Udvardi and S. Khmelevskyi and L. Szunyogh and P. Mohn and P. Weinberger",
year = "2006",
doi = "10.1103/PhysRevB.73.104446",
language = "English",
volume = "73",
journal = "Physical Review B-Condensed Matter",
issn = "0163-1829",
publisher = "American Physical Society",
number = "10",

}

TY - JOUR

T1 - Helimagnetism and competition of exchange interactions in bulk giant magnetoresistance alloys based on Mn Au2

AU - Udvardi, L.

AU - Khmelevskyi, S.

AU - Szunyogh, L.

AU - Mohn, P.

AU - Weinberger, P.

PY - 2006

Y1 - 2006

N2 - By using the generalized perturbation method within the screened Korringa-Kohn-Rostoker formalism we calculate magnetic exchange interactions in the helimagnetic bulk Mn Au2 compound upon alloying Mn with Fe and Cr. The obtained interactions reproduce well the results of neutron diffraction experiments concerning the periodicity of the helix in Mn Au2 and its weakening with Fe substitution thus supporting the conventional interpretation of a metamagnet-ferromagnet transitions due to external fields. In the case of Mn1-x Crx Au2 alloys our results reveal that the experimentally observed magnetization process follows a completely different scenario, predicted theoretically a few decades ago for nearly orthogonal helimagnetics.

AB - By using the generalized perturbation method within the screened Korringa-Kohn-Rostoker formalism we calculate magnetic exchange interactions in the helimagnetic bulk Mn Au2 compound upon alloying Mn with Fe and Cr. The obtained interactions reproduce well the results of neutron diffraction experiments concerning the periodicity of the helix in Mn Au2 and its weakening with Fe substitution thus supporting the conventional interpretation of a metamagnet-ferromagnet transitions due to external fields. In the case of Mn1-x Crx Au2 alloys our results reveal that the experimentally observed magnetization process follows a completely different scenario, predicted theoretically a few decades ago for nearly orthogonal helimagnetics.

UR - http://www.scopus.com/inward/record.url?scp=33645468878&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=33645468878&partnerID=8YFLogxK

U2 - 10.1103/PhysRevB.73.104446

DO - 10.1103/PhysRevB.73.104446

M3 - Article

AN - SCOPUS:33645468878

VL - 73

JO - Physical Review B-Condensed Matter

JF - Physical Review B-Condensed Matter

SN - 0163-1829

IS - 10

M1 - 104446

ER -