Strong magnetic correlations to 900 K in single crystals of the trigonal antiferromagnetic insulators SrMn2As2 and CaMn2As2

Sangeetha, N. S.; Pandey, Abhishek; Benson, Zackery A.; Johnston, D. C.

doi:10.1103/PhysRevB.94.094417

Title: Strong magnetic correlations to 900 K in single crystals of the trigonal antiferromagnetic insulators ${SrMn}_{2} {As}_{2}$ and ${CaMn}_{2} {As}_{2}$

Abstract

Crystallographic, electronic transport, thermal, and magnetic properties are reported for SrMn₂As₂ and CaMn₂As₂ single crystals grown using Sn flux. Rietveld refinements of powder x-ray diffraction data show that the two compounds are isostructural and crystallize in the trigonal CaAl₂Si₂-type structure (space group $$P\bar{3}$$ m1), in agreement with the literature. Electrical resistivity ρ versus temperature T measurements demonstrate insulating ground states for both compounds with activation energies of 85 meV for SrMn₂As₂ and 61 meV for CaMn₂As₂. In a local-moment picture, the Mn⁺² 3d⁵ ions are expected to have high-spin S=5/2 with spectroscopic splitting factor g≈2. Magnetic susceptibility χ and heat capacity Cp measurements versus T reveal antiferromagnetic (AFM) transitions at T_N=120(2) K and 62(3) K for SrMn₂As₂ and CaMn₂As₂, respectively. The anisotropic χ(T≤T_N) data indicate that the hexagonal c axis is the hard axis and hence that the ordered Mn moments are aligned in the ab plane. Finally, the χ(T) data for both compounds and the Cp(T) for SrMn₂As₂ show strong dynamic short-range AFM correlations from T_N up to at least 900 K, likely associated with quasi-two-dimensional connectivity of strong AFM exchange interactions between the Mn spins within the corrugated honeycomb Mn layers parallel to the ab plane.

Authors:

Sangeetha, N. S. ^[1]; Pandey, Abhishek ^[1]; Benson, Zackery A. ^[1]; Johnston, D. C. ^[1]

Ames Lab. and Iowa State Univ., Ames, IA (United States). Dept. of Physics and Astronomy

Publication Date:: Thu Sep 15 00:00:00 EDT 2016

Research Org.:: Ames Lab., Ames, IA (United States)

Sponsoring Org.:: USDOE Office of Science (SC), Basic Energy Sciences (BES)

OSTI Identifier:: 1326842

Alternate Identifier(s):: OSTI ID: 1324865

Report Number(s):: IS-J-9072
Journal ID: ISSN 2469-9950; PRBMDO

Grant/Contract Number:: AC02-07CH11358

Resource Type:: Accepted Manuscript

Journal Name:: Physical Review B

Additional Journal Information:: Journal Volume: 94; Journal Issue: 9; 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


                    Sangeetha, N. S., Pandey, Abhishek, Benson, Zackery A., and Johnston, D. C. Strong magnetic correlations to 900 K in single crystals of the trigonal antiferromagnetic insulators SrMn2As2 and CaMn2As2.  United States: N. p., 2016. 
Web.  doi:10.1103/PhysRevB.94.094417.

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                    Sangeetha, N. S., Pandey, Abhishek, Benson, Zackery A., & Johnston, D. C. Strong magnetic correlations to 900 K in single crystals of the trigonal antiferromagnetic insulators SrMn2As2 and CaMn2As2.  United States.  https://doi.org/10.1103/PhysRevB.94.094417

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                    Sangeetha, N. S., Pandey, Abhishek, Benson, Zackery A., and Johnston, D. C. Thu .  
"Strong magnetic correlations to 900 K in single crystals of the trigonal antiferromagnetic insulators SrMn2As2 and CaMn2As2".  United States.  https://doi.org/10.1103/PhysRevB.94.094417.  https://www.osti.gov/servlets/purl/1326842.

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@article{osti_1326842,

  title        = {Strong magnetic correlations to 900 K in single crystals of the trigonal antiferromagnetic insulators SrMn2As2 and CaMn2As2},

  author       = {Sangeetha, N. S. and Pandey, Abhishek and Benson, Zackery A. and Johnston, D. C.},

  abstractNote = {Crystallographic, electronic transport, thermal, and magnetic properties are reported for SrMn2As2 and CaMn2As2 single crystals grown using Sn flux. Rietveld refinements of powder x-ray diffraction data show that the two compounds are isostructural and crystallize in the trigonal CaAl2Si2-type structure (space group $P\bar{3}$ m1), in agreement with the literature. Electrical resistivity ρ versus temperature T measurements demonstrate insulating ground states for both compounds with activation energies of 85 meV for SrMn2As2 and 61 meV for CaMn2As2. In a local-moment picture, the Mn+2 3d5 ions are expected to have high-spin S=5/2 with spectroscopic splitting factor g≈2. Magnetic susceptibility χ and heat capacity Cp measurements versus T reveal antiferromagnetic (AFM) transitions at TN=120(2) K and 62(3) K for SrMn2As2 and CaMn2As2, respectively. The anisotropic χ(T≤TN) data indicate that the hexagonal c axis is the hard axis and hence that the ordered Mn moments are aligned in the ab plane. Finally, the χ(T) data for both compounds and the Cp(T) for SrMn2As2 show strong dynamic short-range AFM correlations from TN up to at least 900 K, likely associated with quasi-two-dimensional connectivity of strong AFM exchange interactions between the Mn spins within the corrugated honeycomb Mn layers parallel to the ab plane.},

  doi          = {10.1103/PhysRevB.94.094417},

  journal      = {Physical Review B},

  number       = 9,

  volume       = 94,

  place        = {United States},

  year         = {Thu Sep 15 00:00:00 EDT 2016},

  month        = {Thu Sep 15 00:00:00 EDT 2016}

}

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Works referenced in this record:

The first order phase transition and superconductivity in BaNi ₂ As ₂ single crystals
journal, August 2008

Ronning, F.; Kurita, N.; Bauer, E. D.
Journal of Physics: Condensed Matter, Vol. 20, Issue 34
DOI: 10.1088/0953-8984/20/34/342203

Antiferromagnetic order and spin dynamics in iron-based superconductors
journal, August 2015

Dai, Pengcheng
Reviews of Modern Physics, Vol. 87, Issue 3
DOI: 10.1103/RevModPhys.87.855

Crystallographic, electronic, thermal, and magnetic properties of single-crystal SrCo $_{2}$ As $_{2}$
journal, July 2013

Pandey, Abhishek; Quirinale, D. G.; Jayasekara, W.
Physical Review B, Vol. 88, Issue 1
DOI: 10.1103/PhysRevB.88.014526

Magnetic, transport, and thermal properties of single crystals of the layered arsenide ${BaMn}_{2} {As}_{2}$
journal, March 2009

Singh, Yogesh; Ellern, A.; Johnston, D. C.
Physical Review B, Vol. 79, Issue 9
DOI: 10.1103/PhysRevB.79.094519

Magnetic dipole interactions in crystals
journal, January 2016

Johnston, David C.
Physical Review B, Vol. 93, Issue 1
DOI: 10.1103/PhysRevB.93.014421

Spin liquids in frustrated magnets
journal, March 2010

Balents, Leon
Nature, Vol. 464, Issue 7286
DOI: 10.1038/nature08917

Optical properties of the iron-pnictide analog BaMn $_{2}$ As $_{2}$
journal, July 2012

Antal, A.; Knoblauch, T.; Singh, Y.
Physical Review B, Vol. 86, Issue 1
DOI: 10.1103/PhysRevB.86.014506

Weakly ferromagnetic metallic state in heavily doped Ba $_{1 - x}$ K $_{x}$ Mn $_{2}$ As $_{2}$
journal, April 2012

Bao, Jin-Ke; Jiang, Hao; Sun, Yun-Lei
Physical Review B, Vol. 85, Issue 14
DOI: 10.1103/PhysRevB.85.144523

Structural, thermal, magnetic, and electronic transport properties of the LaNi $_{2}$ (Ge $_{1 - x}$ P $_{x}$ ) $_{2}$ system
journal, February 2012

Goetsch, R. J.; Anand, V. K.; Pandey, Abhishek
Physical Review B, Vol. 85, Issue 5
DOI: 10.1103/PhysRevB.85.054517

Geometrical frustration
journal, February 2006

Moessner, Roderich; Ramirez, Arthur P.
Physics Today, Vol. 59, Issue 2
DOI: 10.1063/1.2186278

Structural and physical properties of SrMn2As2
journal, May 2011

Wang, Z. W.; Yang, H. X.; Tian, H. F.
Journal of Physics and Chemistry of Solids, Vol. 72, Issue 5
DOI: 10.1016/j.jpcs.2010.10.053

Magnetic order in ${BaMn}_{2} {As}_{2}$ from neutron diffraction measurements
journal, September 2009

Singh, Yogesh; Green, M. A.; Huang, Q.
Physical Review B, Vol. 80, Issue 10
DOI: 10.1103/PhysRevB.80.100403

Magnetic Susceptibility of Collinear and Noncollinear Heisenberg Antiferromagnets
journal, August 2012

Johnston, D. C.
Physical Review Letters, Vol. 109, Issue 7
DOI: 10.1103/PhysRevLett.109.077201

The magnetic ground state of
journal, September 2009

Ratcliff II, W.; Lima Sharma, A. L.; Gomes, A. M.
Journal of Magnetism and Magnetic Materials, Vol. 321, Issue 17
DOI: 10.1016/j.jmmm.2009.03.054

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

Rodríguez-Carvajal, Juan
Physica B: Condensed Matter, Vol. 192, Issue 1-2
DOI: 10.1016/0921-4526(93)90108-I

Coexistence of Half-Metallic Itinerant Ferromagnetism with Local-Moment Antiferromagnetism in ${Ba}_{0.60} K_{0.40} {Mn}_{2} {As}_{2}$
journal, July 2013

Pandey, Abhishek; Ueland, B. G.; Yeninas, S.
Physical Review Letters, Vol. 111, Issue 4
DOI: 10.1103/PhysRevLett.111.047001

Metal-insulator transition in antiferromagnetic Ba $_{1 - x}$ K $_{x}$ Mn $_{2}$ As $_{2}$ ( $0 \leq x \leq 0.4$ ) single crystals studied by $^{55}$ Mn and $^{75}$ As NMR
journal, December 2013

Yeninas, S.; Pandey, Abhishek; Ogloblichev, V.
Physical Review B, Vol. 88, Issue 24
DOI: 10.1103/PhysRevB.88.241111

Magnetic order in CaMn2Sb2 studied via powder neutron diffraction
journal, November 2009

Bridges, C. A.; Krishnamurthy, V. V.; Poulton, S.
Journal of Magnetism and Magnetic Materials, Vol. 321, Issue 22
DOI: 10.1016/j.jmmm.2009.07.015

Unified molecular field theory for collinear and noncollinear Heisenberg antiferromagnets
journal, February 2015

Johnston, David C.
Physical Review B, Vol. 91, Issue 6
DOI: 10.1103/PhysRevB.91.064427

Itinerant Ferromagnetism in the As $4 p$ Conduction Band of ${Ba}_{0.6} K_{0.4} {Mn}_{2} {As}_{2}$ Identified by X-Ray Magnetic Circular Dichroism
journal, May 2015

Ueland, B. G.; Pandey, Abhishek; Lee, Y.
Physical Review Letters, Vol. 114, Issue 21
DOI: 10.1103/PhysRevLett.114.217001

On the coordination of ThCr2Si2 (BaAl4-type compounds within the field of free parameters
journal, January 1996

Just, G.; Paufler, P.
Journal of Alloys and Compounds, Vol. 232, Issue 1-2
DOI: 10.1016/0925-8388(95)01939-1

Iron-based superconductors: Current status of materials and pairing mechanism
journal, July 2015

Hosono, Hideo; Kuroki, Kazuhiko
Physica C: Superconductivity and its Applications, Vol. 514
DOI: 10.1016/j.physc.2015.02.020

Magnetic structure and spin excitations in ${BaMn}_{2} {Bi}_{2}$
journal, February 2014

Calder, S.; Saparov, B.; Cao, H. B.
Physical Review B, Vol. 89, Issue 6
DOI: 10.1103/PhysRevB.89.064417

${Ba}_{0.4} {Rb}_{0.6} {Mn}_{2} {As}_{2}$ : A prototype half-metallic ferromagnet
journal, November 2015

Pandey, Abhishek; Johnston, D. C.
Physical Review B, Vol. 92, Issue 17
DOI: 10.1103/PhysRevB.92.174401

Electronic State of High Spin MnAs
journal, April 1977

Haneda, Satoshi; Kazama, Noriaki; Yamaguchi, Yasuo
Journal of the Physical Society of Japan, Vol. 42, Issue 4
DOI: 10.1143/JPSJ.42.1201

Superconductivity in ${SrNi}_{2} {As}_{2}$ single crystals
journal, November 2008

Bauer, E. D.; Ronning, F.; Scott, B. L.
Physical Review B, Vol. 78, Issue 17
DOI: 10.1103/PhysRevB.78.172504

Competing Magnetic Fluctuations in Iron Pnictide Superconductors: Role of Ferromagnetic Spin Correlations Revealed by NMR
journal, September 2015

Wiecki, P.; Roy, B.; Johnston, D. C.
Physical Review Letters, Vol. 115, Issue 13
DOI: 10.1103/PhysRevLett.115.137001

Antiferromagnetism in ${EuCu}_{2} {As}_{2}$ and ${EuCu}_{1.82} {Sb}_{2}$ single crystals
journal, May 2015

Anand, V. K.; Johnston, D. C.
Physical Review B, Vol. 91, Issue 18
DOI: 10.1103/PhysRevB.91.184403

Coexistence of antiferromagnetic and ferromagnetic spin correlations in ${SrCo}_{2} {As}_{2}$ revealed by ${}^{59}{Co}$ and ${}^{75}{As}$ NMR
journal, June 2015

Wiecki, P.; Ogloblichev, V.; Pandey, Abhishek
Physical Review B, Vol. 91, Issue 22
DOI: 10.1103/PhysRevB.91.220406

The magnetic structure of EuCu ₂ Sb ₂
journal, May 2015

Ryan, D. H.; Cadogan, J. M.; Anand, V. K.
Journal of Physics: Condensed Matter, Vol. 27, Issue 20
DOI: 10.1088/0953-8984/27/20/206002

Properties of binary transition-metal arsenides ( T As)
journal, July 2012

Saparov, Bayrammurad; Mitchell, Jonathan E.; Sefat, Athena S.
Superconductor Science and Technology, Vol. 25, Issue 8
DOI: 10.1088/0953-2048/25/8/084016

Superconductivity in iron compounds
journal, December 2011

Stewart, G. R.
Reviews of Modern Physics, Vol. 83, Issue 4
DOI: 10.1103/RevModPhys.83.1589

Persistence of local-moment antiferromagnetic order in Ba $_{1 - x}$ K $_{x}$ Mn $_{2}$ As $_{2}$
journal, April 2013

Lamsal, J.; Tucker, G. S.; Heitmann, T. W.
Physical Review B, Vol. 87, Issue 14
DOI: 10.1103/PhysRevB.87.144418

What drives nematic order in iron-based superconductors?
journal, January 2014

Fernandes, R. M.; Chubukov, A. V.; Schmalian, J.
Nature Physics, Vol. 10, Issue 2
DOI: 10.1038/nphys2877

High-temperature superconductivity in iron pnictides and chalcogenides
journal, March 2016

Si, Qimiao; Yu, Rong; Abrahams, Elihu
Nature Reviews Materials, Vol. 1, Issue 4
DOI: 10.1038/natrevmats.2016.17

Renormalized behavior and proximity of ${BaCo}_{2} {As}_{2}$ to a magnetic quantum critical point
journal, January 2009

Sefat, A. S.; Singh, D. J.; Jin, R.
Physical Review B, Vol. 79, Issue 2
DOI: 10.1103/PhysRevB.79.024512

Spin fluctuations in iron pnictides and chalcogenides: From antiferromagnetism to superconductivity
journal, January 2016

Inosov, Dmytro S.
Comptes Rendus Physique, Vol. 17, Issue 1-2
DOI: 10.1016/j.crhy.2015.03.001

Stripe Antiferromagnetic Spin Fluctuations in ${SrCo}_{2} {As}_{2}$
journal, October 2013

Jayasekara, W.; Lee, Y.; Pandey, Abhishek
Physical Review Letters, Vol. 111, Issue 15
DOI: 10.1103/PhysRevLett.111.157001

A common thread: The pairing interaction for unconventional superconductors
journal, October 2012

Scalapino, D. J.
Reviews of Modern Physics, Vol. 84, Issue 4
DOI: 10.1103/RevModPhys.84.1383

Strongly Geometrically Frustrated Magnets
journal, August 1994

Ramirez, A. P.
Annual Review of Materials Science, Vol. 24, Issue 1
DOI: 10.1146/annurev.ms.24.080194.002321

Magnetic exchange interactions in ${BaMn}_{2} {As}_{2}$ : A case study of the $J_{1}$ - $J_{2}$ - $J_{c}$ Heisenberg model
journal, September 2011

Johnston, D. C.; McQueeney, R. J.; Lake, B.
Physical Review B, Vol. 84, Issue 9
DOI: 10.1103/PhysRevB.84.094445

The puzzle of high temperature superconductivity in layered iron pnictides and chalcogenides
journal, October 2010

Johnston, David C.
Advances in Physics, Vol. 59, Issue 6
DOI: 10.1080/00018732.2010.513480

Colloquium : The unexpected properties of alkali metal iron selenide superconductors
journal, May 2013

Dagotto, Elbio
Reviews of Modern Physics, Vol. 85, Issue 2
DOI: 10.1103/RevModPhys.85.849

AB2X2-Verbindungen im CaAl2Si2-Typ, V[1] Zur Struktur der Verbindungen CaMn2P2, CaMn2As2, SrMn2P2 und SrMn2As2 / AB2X2-Compounds with the CaAl2Si2 Structure, V [1] The Crystal Structure of CaMn2P2, CaMn2As2, SrMn2P2, and SrMn2As2
journal, June 1978

Mewis, Albrecht
Zeitschrift für Naturforschung B, Vol. 33, Issue 6
DOI: 10.1515/znb-1978-0608

Neue ternäre Erdalkaliverbindungen des Arsens mit Mangan / New Ternary Alkaline Earth Compounds of Arsenic with Manganese
journal, July 1978

Brechtel, Erwin; Cordier, Gerhard; Schäfer, Herbert
Zeitschrift für Naturforschung B, Vol. 33, Issue 7
DOI: 10.1515/znb-1978-0727

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Title: Strong magnetic correlations to 900 K in single crystals of the trigonal antiferromagnetic insulators SrMn 2 As 2 and CaMn 2 As 2

Abstract

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Title: Strong magnetic correlations to 900 K in single crystals of the trigonal antiferromagnetic insulators ${SrMn}_{2} {As}_{2}$ and ${CaMn}_{2} {As}_{2}$

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The magnetic ground state of
journal, September 2009

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

Coexistence of Half-Metallic Itinerant Ferromagnetism with Local-Moment Antiferromagnetism in ${Ba}_{0.60} K_{0.40} {Mn}_{2} {As}_{2}$
journal, July 2013

Metal-insulator transition in antiferromagnetic Ba $_{1 - x}$ K $_{x}$ Mn $_{2}$ As $_{2}$ ( $0 \leq x \leq 0.4$ ) single crystals studied by $^{55}$ Mn and $^{75}$ As NMR
journal, December 2013

Magnetic order in CaMn2Sb2 studied via powder neutron diffraction
journal, November 2009

Unified molecular field theory for collinear and noncollinear Heisenberg antiferromagnets
journal, February 2015

Itinerant Ferromagnetism in the As $4 p$ Conduction Band of ${Ba}_{0.6} K_{0.4} {Mn}_{2} {As}_{2}$ Identified by X-Ray Magnetic Circular Dichroism
journal, May 2015

On the coordination of ThCr2Si2 (BaAl4-type compounds within the field of free parameters
journal, January 1996

Iron-based superconductors: Current status of materials and pairing mechanism
journal, July 2015

Magnetic structure and spin excitations in ${BaMn}_{2} {Bi}_{2}$
journal, February 2014

${Ba}_{0.4} {Rb}_{0.6} {Mn}_{2} {As}_{2}$ : A prototype half-metallic ferromagnet
journal, November 2015

Electronic State of High Spin MnAs
journal, April 1977

Superconductivity in ${SrNi}_{2} {As}_{2}$ single crystals
journal, November 2008

Competing Magnetic Fluctuations in Iron Pnictide Superconductors: Role of Ferromagnetic Spin Correlations Revealed by NMR
journal, September 2015

Antiferromagnetism in ${EuCu}_{2} {As}_{2}$ and ${EuCu}_{1.82} {Sb}_{2}$ single crystals
journal, May 2015

Coexistence of antiferromagnetic and ferromagnetic spin correlations in ${SrCo}_{2} {As}_{2}$ revealed by ${}^{59}{Co}$ and ${}^{75}{As}$ NMR
journal, June 2015

The magnetic structure of EuCu ₂ Sb ₂
journal, May 2015

Properties of binary transition-metal arsenides ( T As)
journal, July 2012

Superconductivity in iron compounds
journal, December 2011

Persistence of local-moment antiferromagnetic order in Ba $_{1 - x}$ K $_{x}$ Mn $_{2}$ As $_{2}$
journal, April 2013

What drives nematic order in iron-based superconductors?
journal, January 2014

High-temperature superconductivity in iron pnictides and chalcogenides
journal, March 2016

Renormalized behavior and proximity of ${BaCo}_{2} {As}_{2}$ to a magnetic quantum critical point
journal, January 2009

Spin fluctuations in iron pnictides and chalcogenides: From antiferromagnetism to superconductivity
journal, January 2016

Stripe Antiferromagnetic Spin Fluctuations in ${SrCo}_{2} {As}_{2}$
journal, October 2013

A common thread: The pairing interaction for unconventional superconductors
journal, October 2012

Strongly Geometrically Frustrated Magnets
journal, August 1994

Magnetic exchange interactions in ${BaMn}_{2} {As}_{2}$ : A case study of the $J_{1}$ - $J_{2}$ - $J_{c}$ Heisenberg model
journal, September 2011

The puzzle of high temperature superconductivity in layered iron pnictides and chalcogenides
journal, October 2010

Colloquium : The unexpected properties of alkali metal iron selenide superconductors
journal, May 2013

AB2X2-Verbindungen im CaAl2Si2-Typ, V[1] Zur Struktur der Verbindungen CaMn2P2, CaMn2As2, SrMn2P2 und SrMn2As2 / AB2X2-Compounds with the CaAl2Si2 Structure, V [1] The Crystal Structure of CaMn2P2, CaMn2As2, SrMn2P2, and SrMn2As2
journal, June 1978

Neue ternäre Erdalkaliverbindungen des Arsens mit Mangan / New Ternary Alkaline Earth Compounds of Arsenic with Manganese
journal, July 1978