Coexistence of Ferromagnetic and Stripe-Type Antiferromagnetic Spin Fluctuations in YFe2Ge2

Hongliang Wo; Qisi Wang; Yao Shen; Xiaowen Zhang; Yiqing Hao; Yu Feng; Shoudong Shen; Zheng He; Bingying Pan; Wenbin Wang; K. Nakajima; S. Ohira-Kawamura; P. Steffens; M. Boehm; K. Schmalzl; T. R. Forrest; M. Matsuda; Yang Zhao; J. W. Lynn; Zhiping Yin; Jun Zhao

doi:10.1103/PhysRevLett.122.217003

Coexistence of Ferromagnetic and Stripe-Type Antiferromagnetic Spin Fluctuations in YFe2Ge2

Hongliang Wo, Qisi Wang, Yao Shen, Xiaowen Zhang, Yiqing Hao, Yu Feng, Shoudong Shen, Zheng He, Bingying Pan, Wenbin Wang, K. Nakajima, S. Ohira-Kawamura, P. Steffens, M. Boehm, K. Schmalzl, T. R. Forrest, M. Matsuda, Yang Zhao, J. W. Lynn, Zhiping YinJun Zhao

Spectroscopy

Research output: Contribution to journal › Article › peer-review

7 Scopus citations

Abstract

We report neutron scattering measurements of single-crystalline YFe2Ge2 in the normal state, which has the same crystal structure as the 122 family of iron pnictide superconductors. YFe2Ge2 does not exhibit long-range magnetic order but exhibits strong spin fluctuations. Like the iron pnictides, YFe2Ge2 displays anisotropic stripe-type antiferromagnetic spin fluctuations at (π, 0, π). More interesting, however, is the observation of strong spin fluctuations at the in-plane ferromagnetic wave vector (0, 0, π). These ferromagnetic spin fluctuations are isotropic in the (H, K) plane, whose intensity exceeds that of stripe spin fluctuations. Both the ferromagnetic and stripe spin fluctuations remain gapless down to the lowest measured energies. Our results naturally explain the absence of magnetic order in YFe2Ge2 and also imply that the ferromagnetic correlations may be a key ingredient for iron-based materials.

Original language	English
Article number	217003
Journal	Physical Review Letters
Volume	122
Issue number	21
DOIs	https://doi.org/10.1103/PhysRevLett.122.217003
State	Published - May 31 2019

Funding

We thank J. T. Park for the assistance with the ThALES experiment and D. F. Xu and D. L. Feng for discussions. This work was supported by the Innovation Program of Shanghai Municipal Education Commission (Grant No. 2017-01-07-00-07-E00018), the Ministry of Science and Technology of China (Program 973: 2015CB921302), and the National Key R&D Program of the MOST of China (Grant No. 2016YFA0300203). A portion of this research used resources at the High Flux Isotope Reactor, a Department of Energy Office of Science User Facility operated by the Oak Ridge National Laboratory. The experiment at AMATERAS was carried out under approval of J-PARC Center (Proposal No. 2015A0126).

Funders	Funder number
Ministry of Science and Technology of China	2015CB921302
National Key R&D Program of the MOST of China	2016YFA0300203
Shanghai Municipal Education Commission	2017-01-07-00-07-E00018
Shanghai Municipal Education Commission

Access to Document

10.1103/PhysRevLett.122.217003

Cite this

Wo, H., Wang, Q., Shen, Y., Zhang, X., Hao, Y., Feng, Y., Shen, S., He, Z., Pan, B., Wang, W., Nakajima, K., Ohira-Kawamura, S., Steffens, P., Boehm, M., Schmalzl, K., Forrest, T. R., Matsuda, M., Zhao, Y., Lynn, J. W., ... Zhao, J. (2019). Coexistence of Ferromagnetic and Stripe-Type Antiferromagnetic Spin Fluctuations in YFe2Ge2. Physical Review Letters, 122(21), Article 217003. https://doi.org/10.1103/PhysRevLett.122.217003

@article{23eb74f657944267a6872769222bc64d,

title = "Coexistence of Ferromagnetic and Stripe-Type Antiferromagnetic Spin Fluctuations in YFe2Ge2",

abstract = "We report neutron scattering measurements of single-crystalline YFe2Ge2 in the normal state, which has the same crystal structure as the 122 family of iron pnictide superconductors. YFe2Ge2 does not exhibit long-range magnetic order but exhibits strong spin fluctuations. Like the iron pnictides, YFe2Ge2 displays anisotropic stripe-type antiferromagnetic spin fluctuations at (π, 0, π). More interesting, however, is the observation of strong spin fluctuations at the in-plane ferromagnetic wave vector (0, 0, π). These ferromagnetic spin fluctuations are isotropic in the (H, K) plane, whose intensity exceeds that of stripe spin fluctuations. Both the ferromagnetic and stripe spin fluctuations remain gapless down to the lowest measured energies. Our results naturally explain the absence of magnetic order in YFe2Ge2 and also imply that the ferromagnetic correlations may be a key ingredient for iron-based materials.",

author = "Hongliang Wo and Qisi Wang and Yao Shen and Xiaowen Zhang and Yiqing Hao and Yu Feng and Shoudong Shen and Zheng He and Bingying Pan and Wenbin Wang and K. Nakajima and S. Ohira-Kawamura and P. Steffens and M. Boehm and K. Schmalzl and Forrest, {T. R.} and M. Matsuda and Yang Zhao and Lynn, {J. W.} and Zhiping Yin and Jun Zhao",

note = "Publisher Copyright: {\textcopyright} 2019 American Physical Society.",

year = "2019",

month = may,

day = "31",

doi = "10.1103/PhysRevLett.122.217003",

language = "English",

volume = "122",

journal = "Physical Review Letters",

issn = "0031-9007",

publisher = "American Physical Society",

number = "21",

}

Wo, H, Wang, Q, Shen, Y, Zhang, X, Hao, Y, Feng, Y, Shen, S, He, Z, Pan, B, Wang, W, Nakajima, K, Ohira-Kawamura, S, Steffens, P, Boehm, M, Schmalzl, K, Forrest, TR, Matsuda, M, Zhao, Y, Lynn, JW, Yin, Z & Zhao, J 2019, 'Coexistence of Ferromagnetic and Stripe-Type Antiferromagnetic Spin Fluctuations in YFe2Ge2', Physical Review Letters, vol. 122, no. 21, 217003. https://doi.org/10.1103/PhysRevLett.122.217003

TY - JOUR

T1 - Coexistence of Ferromagnetic and Stripe-Type Antiferromagnetic Spin Fluctuations in YFe2Ge2

AU - Wo, Hongliang

AU - Wang, Qisi

AU - Shen, Yao

AU - Zhang, Xiaowen

AU - Hao, Yiqing

AU - Feng, Yu

AU - Shen, Shoudong

AU - He, Zheng

AU - Pan, Bingying

AU - Wang, Wenbin

AU - Nakajima, K.

AU - Ohira-Kawamura, S.

AU - Steffens, P.

AU - Boehm, M.

AU - Schmalzl, K.

AU - Forrest, T. R.

AU - Matsuda, M.

AU - Zhao, Yang

AU - Lynn, J. W.

AU - Yin, Zhiping

AU - Zhao, Jun

PY - 2019/5/31

Y1 - 2019/5/31

N2 - We report neutron scattering measurements of single-crystalline YFe2Ge2 in the normal state, which has the same crystal structure as the 122 family of iron pnictide superconductors. YFe2Ge2 does not exhibit long-range magnetic order but exhibits strong spin fluctuations. Like the iron pnictides, YFe2Ge2 displays anisotropic stripe-type antiferromagnetic spin fluctuations at (π, 0, π). More interesting, however, is the observation of strong spin fluctuations at the in-plane ferromagnetic wave vector (0, 0, π). These ferromagnetic spin fluctuations are isotropic in the (H, K) plane, whose intensity exceeds that of stripe spin fluctuations. Both the ferromagnetic and stripe spin fluctuations remain gapless down to the lowest measured energies. Our results naturally explain the absence of magnetic order in YFe2Ge2 and also imply that the ferromagnetic correlations may be a key ingredient for iron-based materials.

AB - We report neutron scattering measurements of single-crystalline YFe2Ge2 in the normal state, which has the same crystal structure as the 122 family of iron pnictide superconductors. YFe2Ge2 does not exhibit long-range magnetic order but exhibits strong spin fluctuations. Like the iron pnictides, YFe2Ge2 displays anisotropic stripe-type antiferromagnetic spin fluctuations at (π, 0, π). More interesting, however, is the observation of strong spin fluctuations at the in-plane ferromagnetic wave vector (0, 0, π). These ferromagnetic spin fluctuations are isotropic in the (H, K) plane, whose intensity exceeds that of stripe spin fluctuations. Both the ferromagnetic and stripe spin fluctuations remain gapless down to the lowest measured energies. Our results naturally explain the absence of magnetic order in YFe2Ge2 and also imply that the ferromagnetic correlations may be a key ingredient for iron-based materials.

UR - http://www.scopus.com/inward/record.url?scp=85066437078&partnerID=8YFLogxK

U2 - 10.1103/PhysRevLett.122.217003

DO - 10.1103/PhysRevLett.122.217003

M3 - Article

C2 - 31283313

AN - SCOPUS:85066437078

SN - 0031-9007

VL - 122

JO - Physical Review Letters

JF - Physical Review Letters

IS - 21

M1 - 217003

ER -

Coexistence of Ferromagnetic and Stripe-Type Antiferromagnetic Spin Fluctuations in YFe2Ge2

Abstract

Funding

Access to Document

Other files and links

Fingerprint

Cite this