Magnetoelastic couplings in the distorted diamond-chain compound azurite
Autor(a) principal: | |
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Data de Publicação: | 2014 |
Outros Autores: | , , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.1103/PhysRevB.89.174427 http://hdl.handle.net/11449/171596 |
Resumo: | We present results of ultrasonic measurements on a single crystal of the distorted diamond-chain compound azurite Cu3(CO3)2(OH)2. Pronounced elastic anomalies are observed in the temperature dependence of the longitudinal elastic mode c22 which can be assigned to the relevant magnetic interactions in the system and their couplings to the lattice degrees of freedom. From a semiquantitative analysis of the magnetic contribution to c22 the magnetoelastic coupling G=âJ2/âÎμb can be estimated, where J2 is the intradimer coupling constant and Îμb the strain along the intrachain b axis. We find an exceptionally large coupling constant of |G|â 3650 K highlighting an extraordinarily strong sensitivity of J2 against changes of the b-axis lattice parameter. These results are complemented by measurements of the hydrostatic pressure dependence of J2 by means of thermal expansion and magnetic susceptibility measurements performed both at ambient and finite hydrostatic pressure. We propose that a structural peculiarity of this compound, in which Cu2O6 dimer units are incorporated in an unusually stretched manner, is responsible for the anomalously large magnetoelastic coupling. © 2014 American Physical Society. |
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Magnetoelastic couplings in the distorted diamond-chain compound azuriteWe present results of ultrasonic measurements on a single crystal of the distorted diamond-chain compound azurite Cu3(CO3)2(OH)2. Pronounced elastic anomalies are observed in the temperature dependence of the longitudinal elastic mode c22 which can be assigned to the relevant magnetic interactions in the system and their couplings to the lattice degrees of freedom. From a semiquantitative analysis of the magnetic contribution to c22 the magnetoelastic coupling G=âJ2/âÎμb can be estimated, where J2 is the intradimer coupling constant and Îμb the strain along the intrachain b axis. We find an exceptionally large coupling constant of |G|â 3650 K highlighting an extraordinarily strong sensitivity of J2 against changes of the b-axis lattice parameter. These results are complemented by measurements of the hydrostatic pressure dependence of J2 by means of thermal expansion and magnetic susceptibility measurements performed both at ambient and finite hydrostatic pressure. We propose that a structural peculiarity of this compound, in which Cu2O6 dimer units are incorporated in an unusually stretched manner, is responsible for the anomalously large magnetoelastic coupling. © 2014 American Physical Society.Deutsche ForschungsgemeinschaftPhysics Institute, Goethe University Frankfurt(M), D-60438 Frankfurt(M)Instituto de Geociências e Ciências Exatas - IGCe, Unesp - Universidade Estadual Paulista, Departamento de Física, Caixa Postal 178, 13506-970 Rio Claro (SP)Instituto de Geociências e Ciências Exatas - IGCe, Unesp - Universidade Estadual Paulista, Departamento de Física, Caixa Postal 178, 13506-970 Rio Claro (SP)Physics Institute, Goethe University Frankfurt(M)Universidade Estadual Paulista (Unesp)Cong, Pham ThanhWolf, BerndManna, Rudra SekharTutsch, UlrichDe Souza, Mariano [UNESP]Brühl, AndreasLang, Michael2018-12-11T16:56:09Z2018-12-11T16:56:09Z2014-05-27info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://dx.doi.org/10.1103/PhysRevB.89.174427Physical Review B - Condensed Matter and Materials Physics, v. 89, n. 17, 2014.1550-235X1098-0121http://hdl.handle.net/11449/17159610.1103/PhysRevB.89.1744272-s2.0-849021869502-s2.0-84902186950.pdfScopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengPhysical Review B - Condensed Matter and Materials Physics1,604info:eu-repo/semantics/openAccess2024-01-14T06:25:41Zoai:repositorio.unesp.br:11449/171596Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T22:59:50.231468Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Magnetoelastic couplings in the distorted diamond-chain compound azurite |
title |
Magnetoelastic couplings in the distorted diamond-chain compound azurite |
spellingShingle |
Magnetoelastic couplings in the distorted diamond-chain compound azurite Cong, Pham Thanh |
title_short |
Magnetoelastic couplings in the distorted diamond-chain compound azurite |
title_full |
Magnetoelastic couplings in the distorted diamond-chain compound azurite |
title_fullStr |
Magnetoelastic couplings in the distorted diamond-chain compound azurite |
title_full_unstemmed |
Magnetoelastic couplings in the distorted diamond-chain compound azurite |
title_sort |
Magnetoelastic couplings in the distorted diamond-chain compound azurite |
author |
Cong, Pham Thanh |
author_facet |
Cong, Pham Thanh Wolf, Bernd Manna, Rudra Sekhar Tutsch, Ulrich De Souza, Mariano [UNESP] Brühl, Andreas Lang, Michael |
author_role |
author |
author2 |
Wolf, Bernd Manna, Rudra Sekhar Tutsch, Ulrich De Souza, Mariano [UNESP] Brühl, Andreas Lang, Michael |
author2_role |
author author author author author author |
dc.contributor.none.fl_str_mv |
Physics Institute, Goethe University Frankfurt(M) Universidade Estadual Paulista (Unesp) |
dc.contributor.author.fl_str_mv |
Cong, Pham Thanh Wolf, Bernd Manna, Rudra Sekhar Tutsch, Ulrich De Souza, Mariano [UNESP] Brühl, Andreas Lang, Michael |
description |
We present results of ultrasonic measurements on a single crystal of the distorted diamond-chain compound azurite Cu3(CO3)2(OH)2. Pronounced elastic anomalies are observed in the temperature dependence of the longitudinal elastic mode c22 which can be assigned to the relevant magnetic interactions in the system and their couplings to the lattice degrees of freedom. From a semiquantitative analysis of the magnetic contribution to c22 the magnetoelastic coupling G=âJ2/âÎμb can be estimated, where J2 is the intradimer coupling constant and Îμb the strain along the intrachain b axis. We find an exceptionally large coupling constant of |G|â 3650 K highlighting an extraordinarily strong sensitivity of J2 against changes of the b-axis lattice parameter. These results are complemented by measurements of the hydrostatic pressure dependence of J2 by means of thermal expansion and magnetic susceptibility measurements performed both at ambient and finite hydrostatic pressure. We propose that a structural peculiarity of this compound, in which Cu2O6 dimer units are incorporated in an unusually stretched manner, is responsible for the anomalously large magnetoelastic coupling. © 2014 American Physical Society. |
publishDate |
2014 |
dc.date.none.fl_str_mv |
2014-05-27 2018-12-11T16:56:09Z 2018-12-11T16:56:09Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://dx.doi.org/10.1103/PhysRevB.89.174427 Physical Review B - Condensed Matter and Materials Physics, v. 89, n. 17, 2014. 1550-235X 1098-0121 http://hdl.handle.net/11449/171596 10.1103/PhysRevB.89.174427 2-s2.0-84902186950 2-s2.0-84902186950.pdf |
url |
http://dx.doi.org/10.1103/PhysRevB.89.174427 http://hdl.handle.net/11449/171596 |
identifier_str_mv |
Physical Review B - Condensed Matter and Materials Physics, v. 89, n. 17, 2014. 1550-235X 1098-0121 10.1103/PhysRevB.89.174427 2-s2.0-84902186950 2-s2.0-84902186950.pdf |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Physical Review B - Condensed Matter and Materials Physics 1,604 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.source.none.fl_str_mv |
Scopus reponame:Repositório Institucional da UNESP instname:Universidade Estadual Paulista (UNESP) instacron:UNESP |
instname_str |
Universidade Estadual Paulista (UNESP) |
instacron_str |
UNESP |
institution |
UNESP |
reponame_str |
Repositório Institucional da UNESP |
collection |
Repositório Institucional da UNESP |
repository.name.fl_str_mv |
Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP) |
repository.mail.fl_str_mv |
|
_version_ |
1808129480197144576 |