Evolution of charge order through the magnetic phase transition of LuFe2O4

被引：7
作者：
Bartkowiak, M. [1 ,2 ]
Mulders, A. M. [1 ]
Scagnoli, V. [3 ]
Staub, U. [3 ]
Pomjakushina, E. [4 ]
Conder, K. [4 ]
机构：
[1] UNSW, Sch Phys Environm & Math Sci, Canberra, ACT 2600, Australia
[2] Australian Nucl Sci & Technol Org, Bragg Inst, Lucas Heights, NSW 2234, Australia
[3] Paul Scherrer Inst, Swiss Light Source, CH-5232 Villigen, Switzerland
[4] Paul Scherrer Inst, Lab Dev & Methods, CH-5232 Villigen, Switzerland
来源：
PHYSICAL REVIEW B | 2012年 / 86卷 / 03期
基金：
瑞士国家科学基金会;
关键词：
SYSTEM LUFE2O4; SPIN; MOSSBAUER; YFE2O4; YBFE2O4;
D O I：
10.1103/PhysRevB.86.035121
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The charge order in multiferroic LuFe2O4 has been investigated with resonant x-ray diffraction at the Fe K edge in the combined charge ordered and magnetic phase. The energy dependence of the charge order reflection (1/3 1/3 7/2) has been analyzed in detail to investigate the charge disproportionation between the iron sites as a function of temperature. It is found that the charge disproportionation is constant within 0.02e across the Neel temperature T-N. The charge order reflection exhibits a decrease in intensity with increasing temperature which is attributed to an increase in the probability of electron hopping. We confirm the increase in polarization at T-N is not of static origin but rather dynamic. Our observations are consistent with antiferromagnetically aligned magnetic moments inhibiting the double exchange mechanism and reducing the probability of electrons hopping between Fe2+ and Fe3+ in the magnetic phase.
引用
收藏
页数：5
相关论文
共 46 条
[1]   2-DIMENSIONAL SPIN ORDERING IN YFE2O4 [J].
AKIMITSU, J ;
INADA, Y ;
SIRATORI, K ;
SHINDO, I ;
KIMIZUKA, N .
SOLID STATE COMMUNICATIONS, 1979, 32 (11) :1065-1068
[2]   Charge disproportionation in RNiO3 perovskites:: Simultaneous metal-insulator and structural transition in YNiO3 [J].
Alonso, JA ;
García-Muñoz, JL ;
Fernández-Díaz, MT ;
Aranda, MAG ;
Martínez-Lope, MJ ;
Casais, MT .
PHYSICAL REVIEW LETTERS, 1999, 82 (19) :3871-3874
[3]   Charge Order in LuFe2O4: Antiferroelectric Ground State and Coupling to Magnetism [J].
Angst, M. ;
Hermann, R. P. ;
Christianson, A. D. ;
Lumsden, M. D. ;
Lee, C. ;
Whangbo, M. -H. ;
Kim, J. -W. ;
Ryan, P. J. ;
Nagler, S. E. ;
Tian, W. ;
Jin, R. ;
Sales, B. C. ;
Mandrus, D. .
PHYSICAL REVIEW LETTERS, 2008, 101 (22)
[4]   Double-channel excitation in the X-ray absorption spectrum of Fe3+ water solutions [J].
Benfatto, M ;
Solera, JA ;
Ruiz, JG ;
Chaboy, J .
CHEMICAL PHYSICS, 2002, 282 (03) :441-450
[5]   The PILATUS 1M detector [J].
Broennimann, C ;
Eikenberry, EF ;
Henrich, B ;
Horisberger, R ;
Huelsen, G ;
Pohl, E ;
Schmitt, B ;
Schulze-Briese, C ;
Suzuki, M ;
Tomizaki, T ;
Toyokawa, H ;
Wagner, A .
JOURNAL OF SYNCHROTRON RADIATION, 2006, 13 :120-130
[6]   CHARGE MODULATIONS IN LA2-XSRXNIO4+Y - ORDERING OF POLARONS [J].
CHEN, CH ;
CHEONG, SW ;
COOPER, AS .
PHYSICAL REVIEW LETTERS, 1993, 71 (15) :2461-2464
[7]   Three-dimensional magnetic correlations in multiferroic LuFe2O4 [J].
Christianson, A. D. ;
Lumsden, M. D. ;
Angst, M. ;
Yamani, Z. ;
Tian, W. ;
Jin, R. ;
Payzant, E. A. ;
Nagler, S. E. ;
Sales, B. C. ;
Mandrus, D. .
PHYSICAL REVIEW LETTERS, 2008, 100 (10)
[8]   Charge Order in LuFe2O4: An Unlikely Route to Ferroelectricity [J].
de Groot, J. ;
Mueller, T. ;
Rosenberg, R. A. ;
Keavney, D. J. ;
Islam, Z. ;
Kim, J. -W. ;
Angst, M. .
PHYSICAL REVIEW LETTERS, 2012, 108 (18)
[9]   Competing Ferri- and Antiferromagnetic Phases in Geometrically Frustrated LuFe2O4 [J].
de Groot, J. ;
Marty, K. ;
Lumsden, M. D. ;
Christianson, A. D. ;
Nagler, S. E. ;
Adiga, S. ;
Borghols, W. J. H. ;
Schmalzl, K. ;
Yamani, Z. ;
Bland, S. R. ;
de Souza, R. ;
Staub, U. ;
Schweika, W. ;
Su, Y. ;
Angst, M. .
PHYSICAL REVIEW LETTERS, 2012, 108 (03)
[10]   Electronic transport and I-V characteristics of polycrystalline LuFe2O4 [J].
Fisher, B. ;
Genossar, J. ;
Patlagan, L. ;
Reisner, G. M. .
JOURNAL OF APPLIED PHYSICS, 2011, 109 (08)
12345