Quantitative characterization of nanoscale polycrystalline magnets with electron magnetic circular dichroism

被引：41

作者：

Muto, Shunsuke ^{[1
]}

Rusz, Jan ^{[2
]}

Tatsumi, Kazuyoshi ^{[1
]}

Adam, Roman ^{[3
]}

Arai, Shigeo ^{[1
]}

Kocevski, Vancho ^{[2
]}

Oppeneer, Peter M. ^{[2
]}

Buergler, Daniel E. ^{[3
]}

Schneider, Claus M. ^{[3
]}

机构：

[1] Nagoya Univ, EcoTopia Sci Inst, Div Energy Sci, Chikusa Ku, Nagoya, Aichi 4648603, Japan

[2] Uppsala Univ, Dept Phys & Astron, S-75120 Uppsala, Sweden

[3] Forschungszentrum Julich, Peter Grunberg Inst, D-52425 Julich, Germany

来源：

NATURE COMMUNICATIONS | 2014年 / 5卷

基金：

瑞典研究理事会;

关键词：

ABSORPTION; SPECTRUM;

D O I：

10.1038/ncomms4138

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Electron magnetic circular dichroism (EMCD) allows the quantitative, element-selective determination of spin and orbital magnetic moments, similar to its well-established X-ray counterpart, X-ray magnetic circular dichroism (XMCD). As an advantage over XMCD, EMCD measurements are made using transmission electron microscopes, which are routinely operated at sub-nanometre resolution, thereby potentially allowing nanometre magnetic characterization. However, because of the low intensity of the EMCD signal, it has not yet been possible to obtain quantitative information from EMCD signals at the nanoscale. Here we demonstrate a new approach to EMCD measurements that considerably enhances the outreach of the technique. The statistical analysis introduced here yields robust quantitative EMCD signals. Moreover, we demonstrate that quantitative magnetic information can be routinely obtained using electron beams of only a few nanometres in diameter without imposing any restriction regarding the crystalline order of the specimen.

引用

页数：7

共 27 条

[1] SYMMETRY-SELECTED ELECTRON-ENERGY-LOSS SCATTERING IN DIAMOND [J].

BATSON, PE .

PHYSICAL REVIEW LETTERS, 1993, 70 (12) :1822-1825

[2] Experimental application of sum rules for electron energy loss magnetic chiral dichroism [J].

Calmels, L. ;

Houdellier, F. ;

Warot-Fonrose, B. ;

Gatel, C. ;

Hyetch, M. J. ;

Serin, V. ;

Snoeck, E. .

PHYSICAL REVIEW B, 2007, 76 (06)

[3] X-RAY CIRCULAR-DICHROISM AND LOCAL MAGNETIC-FIELDS [J].

CARRA, P ;

THOLE, BT ;

ALTARELLI, M ;

WANG, XD .

PHYSICAL REVIEW LETTERS, 1993, 70 (05) :694-697

[4] EXPERIMENTAL CONFIRMATION OF THE X-RAY MAGNETIC CIRCULAR-DICHROISM SUM-RULES FOR IRON AND COBALT [J].

CHEN, CT ;

IDZERDA, YU ;

LIN, HJ ;

SMITH, NV ;

MEIGS, G ;

CHABAN, E ;

HO, GH ;

PELLEGRIN, E ;

SETTE, F .

PHYSICAL REVIEW LETTERS, 1995, 75 (01) :152-155

[5] CALCULATION OF M23 MAGNETO-OPTICAL ABSORPTION-SPECTRUM OF FERROMAGNETIC NICKEL [J].

ERSKINE, JL ;

STERN, EA .

PHYSICAL REVIEW B, 1975, 12 (11) :5016-5024

[6] A proposal for dichroic experiments in the electron microscope [J].

Hébert, C ;

Schattschneider, P .

ULTRAMICROSCOPY, 2003, 96 (3-4) :463-468

[7] Quantitative Magnetic Information from Reciprocal Space Maps in Transmission Electron Microscopy [J].

Lidbaum, Hans ;

Rusz, Jan ;

Liebig, Andreas ;

Hjorvarsson, Bjorgvin ;

Oppeneer, Peter M. ;

Coronel, Ernesto ;

Eriksson, Olle ;

Leifer, Klaus .

PHYSICAL REVIEW LETTERS, 2009, 102 (03)

[8] Development of new interatomic potentials appropriate for crystalline and liquid iron [J].

Mendelev, MI ;

Han, S ;

Srolovitz, DJ ;

Ackland, GJ ;

Sun, DY ;

Asta, M .

PHILOSOPHICAL MAGAZINE, 2003, 83 (35) :3977-3994

[9] Parameter-free extraction of EMCD from an energy-filtered diffraction datacube using multivariate curve resolution [J].

Muto, S. ;

Tatsumi, K. ;

Rusz, J. .

ULTRAMICROSCOPY, 2013, 125 :89-96

[10] Simulation of magnetic circular dichroism in the electron microscope [J].

Rubino, Stefano ;

Schattschneider, Peter ;

Rusz, Jan ;

Verbeeck, Johan ;

Leifer, Klaus .

JOURNAL OF PHYSICS D-APPLIED PHYSICS, 2010, 43 (47)

← 1 2 3 →