Crystal field excitations in CeCu2Ge2: Revisited employing a single crystal and inelastic neutron scattering

The intermetallic compound, CeCu2Ge2, is the counterpart of the heavy-fermion superconductor CeCu2Si2. CeCu2Ge2 is a magnetically ordering (TN = 4.1K) Kondo lattice with a moderate Sommerfeld coefficient of 140 mJ/ molK2. Earlier inelastic neutron measurements on a polycrystalline sample revealed a...

Full description

Saved in:
Bibliographic Details
Published in:Journal of applied physics 2012-04, Vol.111 (7)
Main Authors: Loewenhaupt, Michael, Faulhaber, Enrico, Schneidewind, Astrid, Deppe, Micha, Hradil, Klaudia
Format: Article
Language:English
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
cited_by cdi_FETCH-LOGICAL-c225t-e74b9dfadc5604fa27c48c451883788201217d1c283c76484c147a1edc35e0513
cites cdi_FETCH-LOGICAL-c225t-e74b9dfadc5604fa27c48c451883788201217d1c283c76484c147a1edc35e0513
container_end_page
container_issue 7
container_start_page
container_title Journal of applied physics
container_volume 111
creator Loewenhaupt, Michael
Faulhaber, Enrico
Schneidewind, Astrid
Deppe, Micha
Hradil, Klaudia
description The intermetallic compound, CeCu2Ge2, is the counterpart of the heavy-fermion superconductor CeCu2Si2. CeCu2Ge2 is a magnetically ordering (TN = 4.1K) Kondo lattice with a moderate Sommerfeld coefficient of 140 mJ/ molK2. Earlier inelastic neutron measurements on a polycrystalline sample revealed a doublet ground state and a quasi-quartet excited state at 16.5 meV, although a splitting of the 4f1 (J = 5/2) ground state multiplet into 3 doublets is expected from the point symmetry of the Ce3+ ions. We performed detailed inelastic neutron scattering experiments on a single crystal at the thermal triple-axis spectrometer PUMA at FRM II for different crystallographic directions. From our results we infer that the quasi-quartet, in fact, consists of two doublets at 17.0 and 18.3 meV which exhibit a strong directional dependence of their transition matrix elements to the ground state doublet. Finally, we will present a new set of crystal field parameters.
doi_str_mv 10.1063/1.3673816
format article
fullrecord <record><control><sourceid>crossref</sourceid><recordid>TN_cdi_crossref_primary_10_1063_1_3673816</recordid><sourceformat>XML</sourceformat><sourcesystem>PC</sourcesystem><sourcerecordid>10_1063_1_3673816</sourcerecordid><originalsourceid>FETCH-LOGICAL-c225t-e74b9dfadc5604fa27c48c451883788201217d1c283c76484c147a1edc35e0513</originalsourceid><addsrcrecordid>eNotkM1KxDAURoMoOI4ufINsXXTMzU-TupOiozAgiK5LvL2VSKYdkow4b2_FWZ3N-c7iY-waxApErW5hpWqrHNQnbAHCNZU1RpyyhRASKtfY5pxd5PwlBIBTzYLFNh1y8ZEPgWLP6QdD8SVMY-Zh5C21e7kmecdf6TvkUGhWtrs4HcL4yT3PMyJxPDb82M8rij6XgHykfUnTyDP6UijN6iU7G3zMdHXkkr0_Pry1T9XmZf3c3m8qlNKUiqz-aPrB92hqoQcvLWqH2oBzyjonBUiwPaB0Cm2tnUbQ1gP1qAwJA2rJbv67mKacEw3dLoWtT4cORPd3Uwfd8Sb1C57kWqc</addsrcrecordid><sourcetype>Aggregation Database</sourcetype><iscdi>true</iscdi><recordtype>article</recordtype></control><display><type>article</type><title>Crystal field excitations in CeCu2Ge2: Revisited employing a single crystal and inelastic neutron scattering</title><source>American Institute of Physics:Jisc Collections:Transitional Journals Agreement 2021-23 (Reading list)</source><creator>Loewenhaupt, Michael ; Faulhaber, Enrico ; Schneidewind, Astrid ; Deppe, Micha ; Hradil, Klaudia</creator><creatorcontrib>Loewenhaupt, Michael ; Faulhaber, Enrico ; Schneidewind, Astrid ; Deppe, Micha ; Hradil, Klaudia</creatorcontrib><description>The intermetallic compound, CeCu2Ge2, is the counterpart of the heavy-fermion superconductor CeCu2Si2. CeCu2Ge2 is a magnetically ordering (TN = 4.1K) Kondo lattice with a moderate Sommerfeld coefficient of 140 mJ/ molK2. Earlier inelastic neutron measurements on a polycrystalline sample revealed a doublet ground state and a quasi-quartet excited state at 16.5 meV, although a splitting of the 4f1 (J = 5/2) ground state multiplet into 3 doublets is expected from the point symmetry of the Ce3+ ions. We performed detailed inelastic neutron scattering experiments on a single crystal at the thermal triple-axis spectrometer PUMA at FRM II for different crystallographic directions. From our results we infer that the quasi-quartet, in fact, consists of two doublets at 17.0 and 18.3 meV which exhibit a strong directional dependence of their transition matrix elements to the ground state doublet. Finally, we will present a new set of crystal field parameters.</description><identifier>ISSN: 0021-8979</identifier><identifier>EISSN: 1089-7550</identifier><identifier>DOI: 10.1063/1.3673816</identifier><language>eng</language><ispartof>Journal of applied physics, 2012-04, Vol.111 (7)</ispartof><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c225t-e74b9dfadc5604fa27c48c451883788201217d1c283c76484c147a1edc35e0513</citedby><cites>FETCH-LOGICAL-c225t-e74b9dfadc5604fa27c48c451883788201217d1c283c76484c147a1edc35e0513</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>314,780,784,27924,27925</link.rule.ids></links><search><creatorcontrib>Loewenhaupt, Michael</creatorcontrib><creatorcontrib>Faulhaber, Enrico</creatorcontrib><creatorcontrib>Schneidewind, Astrid</creatorcontrib><creatorcontrib>Deppe, Micha</creatorcontrib><creatorcontrib>Hradil, Klaudia</creatorcontrib><title>Crystal field excitations in CeCu2Ge2: Revisited employing a single crystal and inelastic neutron scattering</title><title>Journal of applied physics</title><description>The intermetallic compound, CeCu2Ge2, is the counterpart of the heavy-fermion superconductor CeCu2Si2. CeCu2Ge2 is a magnetically ordering (TN = 4.1K) Kondo lattice with a moderate Sommerfeld coefficient of 140 mJ/ molK2. Earlier inelastic neutron measurements on a polycrystalline sample revealed a doublet ground state and a quasi-quartet excited state at 16.5 meV, although a splitting of the 4f1 (J = 5/2) ground state multiplet into 3 doublets is expected from the point symmetry of the Ce3+ ions. We performed detailed inelastic neutron scattering experiments on a single crystal at the thermal triple-axis spectrometer PUMA at FRM II for different crystallographic directions. From our results we infer that the quasi-quartet, in fact, consists of two doublets at 17.0 and 18.3 meV which exhibit a strong directional dependence of their transition matrix elements to the ground state doublet. Finally, we will present a new set of crystal field parameters.</description><issn>0021-8979</issn><issn>1089-7550</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2012</creationdate><recordtype>article</recordtype><recordid>eNotkM1KxDAURoMoOI4ufINsXXTMzU-TupOiozAgiK5LvL2VSKYdkow4b2_FWZ3N-c7iY-waxApErW5hpWqrHNQnbAHCNZU1RpyyhRASKtfY5pxd5PwlBIBTzYLFNh1y8ZEPgWLP6QdD8SVMY-Zh5C21e7kmecdf6TvkUGhWtrs4HcL4yT3PMyJxPDb82M8rij6XgHykfUnTyDP6UijN6iU7G3zMdHXkkr0_Pry1T9XmZf3c3m8qlNKUiqz-aPrB92hqoQcvLWqH2oBzyjonBUiwPaB0Cm2tnUbQ1gP1qAwJA2rJbv67mKacEw3dLoWtT4cORPd3Uwfd8Sb1C57kWqc</recordid><startdate>20120401</startdate><enddate>20120401</enddate><creator>Loewenhaupt, Michael</creator><creator>Faulhaber, Enrico</creator><creator>Schneidewind, Astrid</creator><creator>Deppe, Micha</creator><creator>Hradil, Klaudia</creator><scope>AAYXX</scope><scope>CITATION</scope></search><sort><creationdate>20120401</creationdate><title>Crystal field excitations in CeCu2Ge2: Revisited employing a single crystal and inelastic neutron scattering</title><author>Loewenhaupt, Michael ; Faulhaber, Enrico ; Schneidewind, Astrid ; Deppe, Micha ; Hradil, Klaudia</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c225t-e74b9dfadc5604fa27c48c451883788201217d1c283c76484c147a1edc35e0513</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2012</creationdate><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Loewenhaupt, Michael</creatorcontrib><creatorcontrib>Faulhaber, Enrico</creatorcontrib><creatorcontrib>Schneidewind, Astrid</creatorcontrib><creatorcontrib>Deppe, Micha</creatorcontrib><creatorcontrib>Hradil, Klaudia</creatorcontrib><collection>CrossRef</collection><jtitle>Journal of applied physics</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Loewenhaupt, Michael</au><au>Faulhaber, Enrico</au><au>Schneidewind, Astrid</au><au>Deppe, Micha</au><au>Hradil, Klaudia</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Crystal field excitations in CeCu2Ge2: Revisited employing a single crystal and inelastic neutron scattering</atitle><jtitle>Journal of applied physics</jtitle><date>2012-04-01</date><risdate>2012</risdate><volume>111</volume><issue>7</issue><issn>0021-8979</issn><eissn>1089-7550</eissn><abstract>The intermetallic compound, CeCu2Ge2, is the counterpart of the heavy-fermion superconductor CeCu2Si2. CeCu2Ge2 is a magnetically ordering (TN = 4.1K) Kondo lattice with a moderate Sommerfeld coefficient of 140 mJ/ molK2. Earlier inelastic neutron measurements on a polycrystalline sample revealed a doublet ground state and a quasi-quartet excited state at 16.5 meV, although a splitting of the 4f1 (J = 5/2) ground state multiplet into 3 doublets is expected from the point symmetry of the Ce3+ ions. We performed detailed inelastic neutron scattering experiments on a single crystal at the thermal triple-axis spectrometer PUMA at FRM II for different crystallographic directions. From our results we infer that the quasi-quartet, in fact, consists of two doublets at 17.0 and 18.3 meV which exhibit a strong directional dependence of their transition matrix elements to the ground state doublet. Finally, we will present a new set of crystal field parameters.</abstract><doi>10.1063/1.3673816</doi></addata></record>
fulltext fulltext
identifier ISSN: 0021-8979
ispartof Journal of applied physics, 2012-04, Vol.111 (7)
issn 0021-8979
1089-7550
language eng
recordid cdi_crossref_primary_10_1063_1_3673816
source American Institute of Physics:Jisc Collections:Transitional Journals Agreement 2021-23 (Reading list)
title Crystal field excitations in CeCu2Ge2: Revisited employing a single crystal and inelastic neutron scattering
url http://sfxeu10.hosted.exlibrisgroup.com/loughborough?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&ctx_tim=2025-01-04T02%3A42%3A13IST&url_ver=Z39.88-2004&url_ctx_fmt=infofi/fmt:kev:mtx:ctx&rfr_id=info:sid/primo.exlibrisgroup.com:primo3-Article-crossref&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.atitle=Crystal%20field%20excitations%20in%20CeCu2Ge2:%20Revisited%20employing%20a%20single%20crystal%20and%20inelastic%20neutron%20scattering&rft.jtitle=Journal%20of%20applied%20physics&rft.au=Loewenhaupt,%20Michael&rft.date=2012-04-01&rft.volume=111&rft.issue=7&rft.issn=0021-8979&rft.eissn=1089-7550&rft_id=info:doi/10.1063/1.3673816&rft_dat=%3Ccrossref%3E10_1063_1_3673816%3C/crossref%3E%3Cgrp_id%3Ecdi_FETCH-LOGICAL-c225t-e74b9dfadc5604fa27c48c451883788201217d1c283c76484c147a1edc35e0513%3C/grp_id%3E%3Coa%3E%3C/oa%3E%3Curl%3E%3C/url%3E&rft_id=info:oai/&rft_id=info:pmid/&rfr_iscdi=true