Orphan Spins in the S=5/2 Antiferromagnet CaFe2O4

被引：12

作者：

Stock, C. ^{[1
,2
]}

Rodriguez, E. E. ^{[3
]}

Lee, N. ^{[4
,5
]}

Demmel, F. ^{[6
]}

Fouquet, P. ^{[7
]}

Laver, M. ^{[15
]}

Niedermayer, Ch. ^{[8
]}

Su, Y. ^{[9
]}

Nemkovski, K. ^{[9
]}

Green, M. A. ^{[10
]}

Rodriguez-Rivera, J. A. ^{[11
,12
]}

Kim, J. W. ^{[4
,5
]}

Zhang, L. ^{[13
,14
]}

Cheong, S. -W. ^{[4
,5
]}

机构：

[1] Univ Edinburgh, Sch Phys & Astron, Edinburgh EH9 3FD, Midlothian, Scotland

[2] Univ Edinburgh, Ctr Sci Extreme Condit, Edinburgh EH9 3FD, Midlothian, Scotland

[3] Univ Maryland, Dept Chem & Biochem, College Pk, MD 20742 USA

[4] Rutgers State Univ, Rutgers Ctr Emergent Mat, 136 Frelinghuysen Rd, Piscataway, NJ 08854 USA

[5] Rutgers State Univ, Dept Phys & Astron, 136 Frelinghuysen Rd, Piscataway, NJ 08854 USA

[6] Rutherford Appleton Labs, ISIS Facil, Didcot OX11 0QX, Oxon, England

[7] Inst Laue Langevin, 6 Rue Jules Horowitz,Boite Postale 156, F-38042 Grenoble 9, France

[8] Paul Scherrer Inst, Lab Neutron Scattering, CH-5232 Villigen, Switzerland

[9] Forschungszentrum Julich GmbH, JCNS, Outstn MLZ, Lichtenbergstr 1, D-85747 Garching, Germany

[10] Univ Kent, Sch Phys Sci, Canterbury CT2 7NH, Kent, England

[11] NIST, Ctr Neutron Res, 100 Bur Dr, Gaithersburg, MD 20899 USA

[12] Univ Maryland, Dept Mat Sci, College Pk, MD 20742 USA

[13] Pohang Univ Sci & Technol, Lab Pohang Emergent Mat, Pohang 790784, South Korea

[14] Pohang Univ Sci & Technol, Max Plank POSTECH Ctr Complex Phase Mat, Pohang 790784, South Korea

[15] Univ Birmingham, Sch Met & Mat, Birmingham B15 2TT, W Midlands, England

来源：

PHYSICAL REVIEW LETTERS | 2017年 / 119卷 / 25期

基金：

英国工程与自然科学研究理事会;

关键词：

ELECTRONIC-STRUCTURE; MAGNETIC-ANISOTROPY; ISOLATED CLUSTERS; VORTEX CORE; EXCITATIONS; STATES; SOLITONS; IONS;

D O I：

10.1103/PhysRevLett.119.257204

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

CaFe2O4 is an anisotropic S = 5/2 antiferromagnet with two competing A (up arrow up arrow down arrow down arrow) and B (up arrow up arrow down arrow down arrow) magnetic order parameters separated by static antiphase boundaries at low temperatures. Neutron diffraction and bulk susceptibility measurements, show that the spins near these boundaries are weakly correlated and a carry an uncompensated ferromagnetic moment that can be tuned with a magnetic field. Spectroscopic measurements find these spins are bound with excitation energies less than the bulk magnetic spin waves and resemble the spectra from isolated spin clusters. Localized bound orphaned spins separate the two competing magnetic order parameters in CaFe2O4

引用

页数：6

共 49 条

[1] ALLAIN Y, 1966, CR ACAD SCI B PHYS, V263, P9
[2] Atomic spin structure of antiferromagnetic domain walls
Bode, M.
Vedmedenko, E. Y.
Von Bergmann, K.
Kubetzka, A.
Ferriani, P.
Heinze, S.
Wiesendanger, R.
[J]. NATURE MATERIALS, 2006, 5 (06) : 477 - 481
[3] EXCITATIONS OF ISOLATED CLUSTERS OF CO-2+ MAGNETIC IONS IN KZN0.92CO0.08F3
BUYERS, WJL
HOLDEN, TM
SVENSSON, EC
LOCKWOOD, DJ
[J]. PHYSICAL REVIEW B, 1984, 30 (11): : 6521 - 6528
[4] Self-Adjusted Traveling Solvent Floating Zone Growth of Single Crystal CaFe2O4
Das, Rajasree
Karna, Sunil
Lai, Yen-Chung
Chou, Fang-Cheng
[J]. CRYSTAL GROWTH & DESIGN, 2016, 16 (01) : 499 - 503
[5] THE STRUCTURE OF CALCIUM FERRITE
DECKER, BF
KASPER, JS
[J]. ACTA CRYSTALLOGRAPHICA, 1957, 10 (04): : 332 - 337
[6] Dopant-bound spinons in Cu1-xZnxGeO3
Els, G
Uhrig, GS
Lemmens, P
Vonberg, H
van Loosdrecht, PHM
Guntherodt, G
Fujita, O
Akimitsu, J
Dhalenne, G
Revcolevschi, A
[J]. EUROPHYSICS LETTERS, 1998, 43 (04): : 463 - 468
[7] A metamaterial for directive emission -: art. no. 213902
Enoch, S
Tayeb, G
Sabouroux, P
Guérin, N
Vincent, P
[J]. PHYSICAL REVIEW LETTERS, 2002, 89 (21)
[8] Emergent Honeycomb Lattice in LiZn2Mo3O8
Flint, Rebecca
Lee, Patrick A.
[J]. PHYSICAL REVIEW LETTERS, 2013, 111 (21)
[9] Magnetic cluster excitations
Furrer, Albert
Waldmann, Oliver
[J]. REVIEWS OF MODERN PHYSICS, 2013, 85 (01) : 367 - 420
[10] High Antiferromagnetic Domain Wall Velocity Induced by Neel Spin-Orbit Torques
Gomonay, O.
Jungwirth, T.
Sinova, J.
[J]. PHYSICAL REVIEW LETTERS, 2016, 117 (01)

← 1 2 3 4 5 →