Europium mixed-valence, long-range magnetic order, and dynamic magnetic response in EuCu2(SixGe1-x)2

Nemkovski, Krill S.; Kozlenko, D. P.; Alekseev, Pavel A.; Mignot, J. -M.; Menushenkov, A. P.; Yaroslavtsev, A. A.; Clementyev, E. S.; Ivanov, Alexander S.; Rols, Stephane; Klobes, B.; Hermann, Rachel P.; Gribanov, A. V.

doi:10.1103/PhysRevB.94.195101

Title: Europium mixed-valence, long-range magnetic order, and dynamic magnetic response in ${EuCu}_{2} {(Si}_{x} {Ge}_{1 - x})_{2}$

Abstract

In mixed-valence or heavy-fermion systems, the hybridization between local f orbitals and conduction band states can cause the suppression of long-range magnetic order, which competes with strong spin uctuations. Ce- and Yb-based systems have been found to exhibit fascinating physical properties (heavy-fermion superconductivity, non-Fermi-liquid states, etc.) when tuned to the vicinity of magnetic quantum critical points by use of various external control parameters (temperature, magnetic eld, chemical composition). Recently, similar effects (mixed-valence, Kondo uctuations, heavy Fermi liquid) have been reported to exist in some Eu-based compounds. Unlike Ce (Yb), Eu has a multiple electron (hole) occupancy of its 4f shell, and the magnetic Eu²⁺ state (4f⁷) has no orbital component in the usual LS coupling scheme, which can lead to a quite different and interesting physics. In the EuCu₂(Si_xGe_1-x)₂ series, where the valence can be tuned by varying the Si/Ge ratio, it has been reported that a significant valence uctuation can exist even in the magnetic order regime. This paper presents a detailed study of the latter material using different microscopic probes (XANES, Mossbauer spectroscopy, elastic and inelastic neutron scattering), in which the composition dependence of the magnetic order and dynamics across the series is traced back to the changemore »« less

Authors:

Nemkovski, Krill S. ^[1]; Kozlenko, D. P. ^[2]; Alekseev, Pavel A. ^[3]; Mignot, J. -M. ^[4]; Menushenkov, A. P. ^[5]; Yaroslavtsev, A. A. ^[6]; Clementyev, E. S. ^[7]; Ivanov, Alexander S. ^[8]; Rols, Stephane ^[8]; Klobes, B. ^[9]; Hermann, Rachel P. ^[10]; Gribanov, A. V. ^[11]

Forschungszentrum JulichGmbH, Garching (Germany)
Frank Lab. of Neutron Physics, Moscow Region (Russia)
National Research Centre "Kurchatov Institute", Moscow (Russia); National Research Nuclear Univ. MEPhI (Moscow Engineering Physics Institute), Moscow (Russia)
Lab. Leon Brillouin-UMR12 CNRS-CEA, Gif-sur-Yvette (France)
National Research Nuclear Univ. MEPhI (Moscow Engineering Physics Institute), Moscow (Russia)
National Research Nuclear Univ. MEPhI (Moscow Engineering Physics Institute), Moscow (Russia); European XFEL GmbH, Schenefeld (Germany)
I Kant Baltic Federal Univ., Kaliningrad (Russia); Institute for Nuclear Research RAS, Moscow (Russia)
Institute Laue-Langevin, Grenoble Cedex (France)
Forschungszentrum Julich GmbH, Julich (Germany)
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Moscow State Univ., Moscow (Russia)

Publication Date:: Tue Nov 01 00:00:00 EDT 2016

Research Org.:: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)

Sponsoring Org.:: USDOE Office of Science (SC)

OSTI Identifier:: 1331099

Alternate Identifier(s):: OSTI ID: 1330601

Grant/Contract Number:: AC05-00OR22725

Resource Type:: Accepted Manuscript

Journal Name:: Physical Review B

Additional Journal Information:: Journal Volume: 94; Journal Issue: 19; Journal ID: ISSN 2469-9950

Publisher:: American Physical Society (APS)

Country of Publication:: United States

Language:: English

Subject:: 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY

Citation Formats


                    Nemkovski, Krill S., Kozlenko, D. P., Alekseev, Pavel A., Mignot, J. -M., Menushenkov, A. P., Yaroslavtsev, A. A., Clementyev, E. S., Ivanov, Alexander S., Rols, Stephane, Klobes, B., Hermann, Rachel P., and Gribanov, A. V. Europium mixed-valence, long-range magnetic order, and dynamic magnetic response in EuCu2(SixGe1-x)2.  United States: N. p., 2016. 
Web.  doi:10.1103/PhysRevB.94.195101.

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                    Nemkovski, Krill S., Kozlenko, D. P., Alekseev, Pavel A., Mignot, J. -M., Menushenkov, A. P., Yaroslavtsev, A. A., Clementyev, E. S., Ivanov, Alexander S., Rols, Stephane, Klobes, B., Hermann, Rachel P., & Gribanov, A. V. Europium mixed-valence, long-range magnetic order, and dynamic magnetic response in EuCu2(SixGe1-x)2.  United States.  https://doi.org/10.1103/PhysRevB.94.195101

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                    Nemkovski, Krill S., Kozlenko, D. P., Alekseev, Pavel A., Mignot, J. -M., Menushenkov, A. P., Yaroslavtsev, A. A., Clementyev, E. S., Ivanov, Alexander S., Rols, Stephane, Klobes, B., Hermann, Rachel P., and Gribanov, A. V. Tue .  
"Europium mixed-valence, long-range magnetic order, and dynamic magnetic response in EuCu2(SixGe1-x)2".  United States.  https://doi.org/10.1103/PhysRevB.94.195101.  https://www.osti.gov/servlets/purl/1331099.

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@article{osti_1331099,

  title        = {Europium mixed-valence, long-range magnetic order, and dynamic magnetic response in EuCu2(SixGe1-x)2},

  author       = {Nemkovski, Krill S. and Kozlenko, D. P. and Alekseev, Pavel A. and Mignot, J. -M. and Menushenkov, A. P. and Yaroslavtsev, A. A. and Clementyev, E. S. and Ivanov, Alexander S. and Rols, Stephane and Klobes, B. and Hermann, Rachel P. and Gribanov, A. V.},

  abstractNote = {In mixed-valence or heavy-fermion systems, the hybridization between local f orbitals and conduction band states can cause the suppression of long-range magnetic order, which competes with strong spin uctuations. Ce- and Yb-based systems have been found to exhibit fascinating physical properties (heavy-fermion superconductivity, non-Fermi-liquid states, etc.) when tuned to the vicinity of magnetic quantum critical points by use of various external control parameters (temperature, magnetic eld, chemical composition). Recently, similar effects (mixed-valence, Kondo uctuations, heavy Fermi liquid) have been reported to exist in some Eu-based compounds. Unlike Ce (Yb), Eu has a multiple electron (hole) occupancy of its 4f shell, and the magnetic Eu2+ state (4f7) has no orbital component in the usual LS coupling scheme, which can lead to a quite different and interesting physics. In the EuCu2(SixGe1-x)2 series, where the valence can be tuned by varying the Si/Ge ratio, it has been reported that a significant valence uctuation can exist even in the magnetic order regime. This paper presents a detailed study of the latter material using different microscopic probes (XANES, Mossbauer spectroscopy, elastic and inelastic neutron scattering), in which the composition dependence of the magnetic order and dynamics across the series is traced back to the change in the Eu valence state. In particular, the results support the persistence of valence uctuations into the antiferromagnetic state over a sizable composition range below the critical Si concentration xc ≈ 0:65. In conclusion, the sequence of magnetic ground states in the series is shown to re ect the evolution of the magnetic spectral response.},

  doi          = {10.1103/PhysRevB.94.195101},

  journal      = {Physical Review B},

  number       = 19,

  volume       = 94,

  place        = {United States},

  year         = {Tue Nov 01 00:00:00 EDT 2016},

  month        = {Tue Nov 01 00:00:00 EDT 2016}

}

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We studied the electronic structure of the heavy-fermion compound Yb(Ru_1–xRh_x)₂Ge₂ with x = 0 and nominally x = 0.125 using ARPES and LDA calculations. We find a valence band structure of Yb corresponding to a noninteger valence close to 3+. The three observed crystal electric field levels with a splitting of 32 and 75 meV confirm the suggested configuration with a quasiquartet ground state. The experimentally determined band structure of the conduction electrons with predominantly Ru 4d character is well reproduced by our calculations. YbRu₂Ge₂ undergoes a nonmagnetic phase transition into a ferroquadrupolar ordered state below 10.2 K and thenmore »« less
Cited by 2
https://doi.org/10.1103/PhysRevB.99.075159

Full Text Available
Tuning the magnetic ground state of ${Ce}_{1 - x} {Yb}_{x} {RhIn}_{5}$ by Yb valence fluctuations

Journal Article Jang, S. ; Pouse, N. ; Keiber, T. ; ... - Physical Review B

We characterize the properties of Ce_1–x Yb_x RhIn₅ single crystals with 0 ≤ x ≤ 1 using measurements of powder x-ray diffraction, energy dispersive x-ray spectroscopy, electrical resistivity, magnetic susceptibility, specific heat, x-ray absorption near edge structure (XANES), and neutron diffraction. Here, the Yb valence v Yb , calculated from the magnetic susceptibility and measured using XANES, decreases from 3+ at x = 0 to ~2.1+ at x_act = 0.2 , where x_act is the measured Yb concentration. A transition from incommensurate to commensurate antiferromagnetism is observed in neutron diffraction measurements along Q = (0.5, 0.5, l) between 0.2 ≤more »« less
https://doi.org/10.1103/physrevb.98.195118

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Electronic structure of YbGa $_{1.15}$ Si $_{0.85}$ and YbGa $_{x}$ Ge $_{2 - x}$ probed by resonant x-ray emission and photoelectron spectroscopies

Journal Article Yamaoka, Hitoshi ; Jarrige, Ignace ; Tsujii, Naohito ; ... - Physical Review. B, Condensed Matter and Materials Physics

We performed an x-ray spectroscopic study combining resonant x-ray emission spectroscopy (RXES) and photoelectron spectroscopy on the superconducting ternary silicide YbGa 1 . 15 Si 0 . 85 and nonsuperconducting ternary germanide YbGa x Ge 2 - x ( x =1.0 and 1.1). The Yb valence for all three compounds is found to be about 2.3. In YbGa 1 . 15 Si 0 . 85 no temperature dependence of the Yb valence is observed in the RXES spectra in the temperature range of 7–300 K, while the valence shows a drastic increase under pressure from the Yb 2 + statemore »« less
https://doi.org/10.1103/PhysRevB.83.104525

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Title: Europium mixed-valence, long-range magnetic order, and dynamic magnetic response in EuCu 2 ( Si x Ge 1 - x ) 2

Abstract

Citation Formats

Magnetism, Metal‐Insulator Transition, and Optical Properties in Sm‐ and Some Other Divalent Rare‐Earth Monochalcogenides journal, March 1971

Intense low-energy ferromagnetic fluctuations in the antiferromagnetic heavy-fermion metal CeB6 journal, May 2014

Europium valency in EuCu2−x Fe x Si2, EuCu2Si2−x Ge x , EuCu2−x Si2+x and EuNi2−x Si2+x journal, March 1987

Hybridization Phenomena in Nearly-Half-Filled f -Shell Electron Systems: Photoemission Study of EuNi 2 P 2 journal, January 2009

Optical Study of Archetypical Valence-Fluctuating Eu Systems journal, December 2012

X-Ray Absorption Study of Mixed-Valence TmSe journal, May 1980

Antiferromagnetism in 4f-systems with valence instabilities journal, December 1988

Quasiparticle band structure of CeCu2Si2 and CeAl3 journal, June 1986

Valence fluctuation phenomena journal, January 1981

Magnetic Properties of Some Rare Earth Hexaborides journal, January 1967

Spontaneous Relaxation of the Local 4 f Magnetization in Ce Pd 3 journal, April 1977

Recent advances in magnetic structure determination by neutron powder diffraction journal, October 1993

Final-state effects in divalent Eu pnictides journal, February 1994

Magnetically driven superconductivity in CeCu2Si2 journal, December 2010

Coexistence of long range magnetic order and intervalent state of Eu in EuCu2(Si x Ge1 − x )2: Evidence from neutron diffraction and spectroscopic studies journal, April 2014

Spin dynamics of Ce X 2 Si 2 ( X= Au, Pd, Rh, Ru) journal, March 1989

Heavy Fermion State Based on the Kondo Effect in EuNi 2 P 2 journal, August 2013

Magnetically mediated superconductivity in heavy fermion compounds journal, July 1998

Quantum criticality in heavy-fermion metals journal, March 2008

Field-Dependent Magnetic Phase Transitions in Mixed-Valent TmSe journal, October 1977

A comparison of the dynamical susceptibility of trivalent and intermediate valent TmSe studied by inelastic neutron scattering journal, December 1981

Physical Properties of Sm B 6 journal, March 1971

A new and unique Eu-based mixed valence system: EuPd 2 Si 2 journal, March 1981

Magnetic excitations in intermediate-valence semiconductors with a singlet ground state journal, January 1995

Field-induced density wave in the heavy-fermion compound CeRhIn5 journal, March 2015

Valence change of europium in EuFe 2 As 1.4 P 0.6 and compressed EuFe 2 As 2 and its relation to superconductivity journal, October 2010

Observation of f -Band Hybridization Gap in the Anomalous Rare-Earth Compound Yb Al 3 journal, April 1985

Spin dynamics of the intermediate-valence compound EuCu2Si2 journal, July 2007

A Transition from Localized to Strongly Correlated Electron Behavior and Mixed Valence Driven by Physical or Chemical Pressure in ACo 2 As 2 (A = Eu and Ca) journal, February 2016

Antiferromagnetism, valence fluctuation, and heavy-fermion behavior in EuCu 2 ( Ge 1 − x Si x ) 2 journal, January 2004

Phase diagram of pressure-induced superconductivity in EuFe 2 As 2 probed by high-pressure resistivity up to 3.2 GPa journal, June 2011

Magnetic and some thermal properties of chalcogenides of Pr and Tm and a few other rare earths journal, January 1975

Pressure-induced changes in the magnetic and valence state of EuFe 2 As 2 journal, July 2011

Divergence of the Very-Low-Temperature Residual Resistivity of Tm x Se as x → 1 journal, July 1979

Visualizing heavy fermions emerging in a quantum critical Kondo lattice journal, June 2012

Combined Mössbauer and LIII-edge X-ray absorption study of mixed- valent EuPd2Si2 and EuNi2P2 journal, April 1985

Spin dynamics of mixed-valent rare-earth compounds journal, January 1979

The semiconductor-metal transition of the samarium mono-chalcogenides journal, October 1972

VALENCE DETERMINATION IN EuM 2 X 2 COMPOUNDS : L III -EDGE VERSUS MÖSSBAUER ISOMER SHIFT journal, December 1986

Magnetic and Semiconducting Properties of Sm B 6 journal, February 1969

Onset of antiferromagnetism in heavy-fermion metals journal, September 2000

Neutron scattering on concentrated and diluted mixed-valent Tm-systems journal, October 1983

Temperature and pressure dependence of lattice parameters of the XCu2Si2 compounds (X=Ce, Eu, Yb, La, Gd, Lu, Ca, Th) journal, June 1985

Strength of the spin-fluctuation-mediated pairing interaction in a high-temperature superconductor journal, January 2009

Magnetic excitations in EuCu 2 (Si x Ge 1− x ) 2 : from mixed valence towards magnetism journal, August 2012

Heavy fermion semiconductors journal, May 2000

Theory of Spin Fluctuations in Tm Compounds journal, July 1981

Thermal neutron diffraction determination of the magnetic structure of EuCu 2 Ge 2 journal, May 2014

What is Origin of the First Eu-Based Heavy Fermion? journal, January 2013

Structural properties and band structure of heavy fermion systems: CeCu2Si2 and LaCu2Si2 journal, December 1983

A universal relationship between magnetic resonance and superconducting gap in unconventional superconductors journal, October 2009

Application of Doniach Diagram on Valence Transition in EuCu 2 (Si x Ge 1- x ) 2 journal, December 2003

Crystal-field excitations in Ce X 2 Si 2 (X=Au, Ag, Pd, and Ru) journal, February 1989

Final-State Effects in the Eu L III -Edge Spectrum of Eu Pd 2 P 2 journal, March 1985

Theory of intermediate valence for systems with two magnetic configurations journal, June 1981

Valence transitions of Sm in monosulfide solid solutions journal, May 1975

Effect of Spin–Orbit Coupling on Kondo Phenomena in f 7 -Electron Systems journal, November 2015

Magnetic order in a Kondo lattice: A neutron scattering study of CeCu2Ge2 journal, February 1989

X-Ray Absorption Study of Mixed-Valence TmSe journal, May 1980

Quantum Criticality in Heavy Fermion Metals text, January 2007

Magnetically driven superconductivity in CeCu2Si2 text, January 2012

Optical study of archetypical valence-fluctuating Eu-systems text, January 2012

Intense low-energy ferromagnetic fluctuations in the antiferromagnetic heavy-fermion metal CeB6 text, January 2013

Field induced density wave in the heavy fermion compound CeRhIn5 text, January 2015

Effect of Spin-Orbit Coupling on Kondo Phenomena in $f^7$-Electron Systems text, January 2015

Onset of antiferromagnetism in heavy fermion metals text, January 2000

Influence of europium doping on magnetic properties of 3D topological semimetal Cd3As2 from ESR data journal, January 2018

Title: Europium mixed-valence, long-range magnetic order, and dynamic magnetic response in ${EuCu}_{2} {(Si}_{x} {Ge}_{1 - x})_{2}$

Magnetism, Metal‐Insulator Transition, and Optical Properties in Sm‐ and Some Other Divalent Rare‐Earth Monochalcogenides
journal, March 1971

Intense low-energy ferromagnetic fluctuations in the antiferromagnetic heavy-fermion metal CeB6
journal, May 2014

Europium valency in EuCu2−x Fe x Si2, EuCu2Si2−x Ge x , EuCu2−x Si2+x and EuNi2−x Si2+x
journal, March 1987

Hybridization Phenomena in Nearly-Half-Filled $f$ -Shell Electron Systems: Photoemission Study of ${EuNi}_{2} P_{2}$
journal, January 2009

Optical Study of Archetypical Valence-Fluctuating Eu Systems
journal, December 2012

X-Ray Absorption Study of Mixed-Valence TmSe
journal, May 1980

Antiferromagnetism in 4f-systems with valence instabilities
journal, December 1988

Quasiparticle band structure of CeCu2Si2 and CeAl3
journal, June 1986

Valence fluctuation phenomena
journal, January 1981

Magnetic Properties of Some Rare Earth Hexaborides
journal, January 1967

Spontaneous Relaxation of the Local $4 f$ Magnetization in Ce ${Pd}_{3}$
journal, April 1977

Recent advances in magnetic structure determination by neutron powder diffraction
journal, October 1993

Final-state effects in divalent Eu pnictides
journal, February 1994

Magnetically driven superconductivity in CeCu2Si2
journal, December 2010

Coexistence of long range magnetic order and intervalent state of Eu in EuCu2(Si x Ge1 − x )2: Evidence from neutron diffraction and spectroscopic studies
journal, April 2014

Spin dynamics of Ce $X_{2}$ ${Si}_{2}$ ( X= Au, Pd, Rh, Ru)
journal, March 1989

Heavy Fermion State Based on the Kondo Effect in EuNi ₂ P ₂
journal, August 2013

Magnetically mediated superconductivity in heavy fermion compounds
journal, July 1998

Quantum criticality in heavy-fermion metals
journal, March 2008

Field-Dependent Magnetic Phase Transitions in Mixed-Valent TmSe
journal, October 1977

A comparison of the dynamical susceptibility of trivalent and intermediate valent TmSe studied by inelastic neutron scattering
journal, December 1981

Physical Properties of Sm $B_{6}$
journal, March 1971

A new and unique Eu-based mixed valence system: EuPd ₂ Si ₂
journal, March 1981

Magnetic excitations in intermediate-valence semiconductors with a singlet ground state
journal, January 1995

Field-induced density wave in the heavy-fermion compound CeRhIn5
journal, March 2015

Valence change of europium in ${EuFe}_{2} {As}_{1.4} P_{0.6}$ and compressed ${EuFe}_{2} {As}_{2}$ and its relation to superconductivity
journal, October 2010

Observation of $f$ -Band Hybridization Gap in the Anomalous Rare-Earth Compound Yb ${Al}_{3}$
journal, April 1985

Spin dynamics of the intermediate-valence compound EuCu2Si2
journal, July 2007

A Transition from Localized to Strongly Correlated Electron Behavior and Mixed Valence Driven by Physical or Chemical Pressure in ACo ₂ As ₂ (A = Eu and Ca)
journal, February 2016

Antiferromagnetism, valence fluctuation, and heavy-fermion behavior in ${EuCu}_{2} ({Ge}_{1 - x} {Si}_{x})_{2}$
journal, January 2004

Phase diagram of pressure-induced superconductivity in EuFe $_{2}$ As $_{2}$ probed by high-pressure resistivity up to 3.2 GPa
journal, June 2011

Magnetic and some thermal properties of chalcogenides of Pr and Tm and a few other rare earths
journal, January 1975

Pressure-induced changes in the magnetic and valence state of EuFe $_{2}$ As $_{2}$
journal, July 2011

Divergence of the Very-Low-Temperature Residual Resistivity of ${Tm}_{x} Se$ as $x \to 1$
journal, July 1979

Visualizing heavy fermions emerging in a quantum critical Kondo lattice
journal, June 2012

Combined Mössbauer and LIII-edge X-ray absorption study of mixed- valent EuPd2Si2 and EuNi2P2
journal, April 1985

Spin dynamics of mixed-valent rare-earth compounds
journal, January 1979

The semiconductor-metal transition of the samarium mono-chalcogenides
journal, October 1972

VALENCE DETERMINATION IN EuM ₂ X ₂ COMPOUNDS : L _III -EDGE VERSUS MÖSSBAUER ISOMER SHIFT
journal, December 1986

Magnetic and Semiconducting Properties of Sm $B_{6}$
journal, February 1969

Onset of antiferromagnetism in heavy-fermion metals
journal, September 2000

Neutron scattering on concentrated and diluted mixed-valent Tm-systems
journal, October 1983

Temperature and pressure dependence of lattice parameters of the XCu2Si2 compounds (X=Ce, Eu, Yb, La, Gd, Lu, Ca, Th)
journal, June 1985

Strength of the spin-fluctuation-mediated pairing interaction in a high-temperature superconductor
journal, January 2009

Magnetic excitations in EuCu ₂ (Si _x Ge _{1− x} ) ₂ : from mixed valence towards magnetism
journal, August 2012

Heavy fermion semiconductors
journal, May 2000

Theory of Spin Fluctuations in Tm Compounds
journal, July 1981

Thermal neutron diffraction determination of the magnetic structure of EuCu ₂ Ge ₂
journal, May 2014

What is Origin of the First Eu-Based Heavy Fermion?
journal, January 2013

Structural properties and band structure of heavy fermion systems: CeCu2Si2 and LaCu2Si2
journal, December 1983

A universal relationship between magnetic resonance and superconducting gap in unconventional superconductors
journal, October 2009

Application of Doniach Diagram on Valence Transition in EuCu ₂ (Si _x Ge _{1- x} ) ₂
journal, December 2003

Crystal-field excitations in Ce $X_{2}$ ${Si}_{2}$ (X=Au, Ag, Pd, and Ru)
journal, February 1989

Final-State Effects in the Eu $L_{III}$ -Edge Spectrum of Eu ${Pd}_{2}$ $P_{2}$
journal, March 1985

Theory of intermediate valence for systems with two magnetic configurations
journal, June 1981

Valence transitions of Sm in monosulfide solid solutions
journal, May 1975

Effect of Spin–Orbit Coupling on Kondo Phenomena in f ⁷ -Electron Systems
journal, November 2015

Magnetic order in a Kondo lattice: A neutron scattering study of CeCu2Ge2
journal, February 1989

X-Ray Absorption Study of Mixed-Valence TmSe
journal, May 1980

Quantum Criticality in Heavy Fermion Metals
text, January 2007

Magnetically driven superconductivity in CeCu2Si2
text, January 2012

Optical study of archetypical valence-fluctuating Eu-systems
text, January 2012

Intense low-energy ferromagnetic fluctuations in the antiferromagnetic heavy-fermion metal CeB6
text, January 2013

Field induced density wave in the heavy fermion compound CeRhIn5
text, January 2015

Effect of Spin-Orbit Coupling on Kondo Phenomena in $f^7$-Electron Systems
text, January 2015

Onset of antiferromagnetism in heavy fermion metals
text, January 2000

Influence of europium doping on magnetic properties of 3D topological semimetal Cd3As2 from ESR data
journal, January 2018