Influence of the pump pulse wavelength on the ultrafast demagnetization of Gd(0001) thin films

被引：9

作者：

Bobowski, Kamil ^{[1
]}

Gleich, Markus ^{[1
]}

Pontius, Niko ^{[2
]}

Schuessler-Langeheine, Christian ^{[2
]}

Trabant, Christoph ^{[1
]}

Wietstruk, Marko ^{[1
]}

Frietsch, Bjoern ^{[1
]}

Weinelt, Martin ^{[1
]}

机构：

[1] Free Univ Berlin, Fachbereich Phys, Arnimallee 14, D-14195 Berlin, Germany

[2] Helmholtz Zentrum Berlin Mat & Energie GmbH, Albert Einstein Str 15, D-12489 Berlin, Germany

来源：

JOURNAL OF PHYSICS-CONDENSED MATTER | 2017年 / 29卷 / 23期

关键词：

epitaxial gadolinium film; ultrafast magnetization dynamics; x-ray magnetic circular dichroism in reflection; GADOLINIUM; MAGNETISM; GD;

D O I：

10.1088/1361-648X/aa6c92

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

We studied the magnetization dynamics of gadolinium metal after femtosecond laser excitation recording the x-ray magnetic circular dichroism in reflection (XMCD-R) at the Gd M-5 absorption edge. Varying the photon energy of the pump pulse allows us to change the initial energy distribution of photoexcited carriers. The overall similar response for excitation with 0.95, 1.55 and 3.10 eV photons at comparable pump fluences indicates that ultrafast ballistic carrier transport leads to a homogeneous energy distribution on the femtosecond timescale in the probed sample volume. Differences are observed in the initial ultrafast demagnetization magnitude. They are attributed to an enhanced spin-flip probability at higher electron energies characterizing the non-thermal electron distribution.

引用

页数：5

共 35 条

[1] ELECTRONIC-STRUCTURE, MAGNETISM, AND FERMI SURFACES OF GD AND TB
AHUJA, R
AULUCK, S
JOHANSSON, B
BROOKS, MSS
[J]. PHYSICAL REVIEW B, 1994, 50 (08) : 5147 - 5154
[2] Separating Exchange Splitting from Spin Mixing in Gadolinium by Femtosecond Laser Excitation
Andres, Beatrice
Christ, Marc
Gahl, Cornelius
Wietstruk, Marko
Weinelt, Martin
Kirschner, Juergen
[J]. PHYSICAL REVIEW LETTERS, 2015, 115 (20)
[3] MAGNETISM AND STRUCTURE OF ULTRATHIN GD FILMS
ASPELMEIER, A
GERHARDTER, F
BABERSCHKE, K
[J]. JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 1994, 132 (1-3) : 22 - 30
[4] Magnetic coupling in Gd/Ni bilayers
Barth, A.
Treubel, F.
Marszalek, M.
Evenson, W.
Hellwig, O.
Borschel, C.
Albrecht, M.
Schatz, G.
[J]. JOURNAL OF PHYSICS-CONDENSED MATTER, 2008, 20 (39)
[5] Superdiffusive Spin Transport as a Mechanism of Ultrafast Demagnetization
Battiato, M.
Carva, K.
Oppeneer, P. M.
[J]. PHYSICAL REVIEW LETTERS, 2010, 105 (02)
[6] Coherent and incoherent excitations of the Gd(0001) surface on ultrafast timescales
Bovensiepen, Uwe
[J]. JOURNAL OF PHYSICS-CONDENSED MATTER, 2007, 19 (08)
[7] Magnetic phase transitions and the magnetothermal properties of gadolinium
Dan'kov, SY
Tishin, AM
Pecharsky, VK
Gschneidner, KA
[J]. PHYSICAL REVIEW B, 1998, 57 (06) : 3478 - 3490
[8] Role of spin-lattice coupling in the ultrafast demagnetization of Gd1-xTbx alloys
Eschenlohr, A.
Sultan, M.
Melnikov, A.
Bergeard, N.
Wieczorek, J.
Kachel, T.
Stamm, C.
Bovensiepen, U.
[J]. PHYSICAL REVIEW B, 2014, 89 (21)
[9] THICKNESS-DEPENDENT CURIE-TEMPERATURE OF GD(0001)/W(110) AND ITS DEPENDENCE ON THE GROWTH-CONDITIONS
FARLE, M
BABERSCHKE, K
STETTER, U
ASPELMEIER, A
GERHARDTER, F
[J]. PHYSICAL REVIEW B, 1993, 47 (17): : 11571 - 11574
[10] Disparate ultrafast dynamics of itinerant and localized magnetic moments in gadolinium metal
Frietsch, B.
Bowlan, J.
Carley, R.
Teichmann, M.
Wienholdt, S.
Hinzke, D.
Nowak, U.
Carva, K.
Oppeneer, P. M.
Weinelt, M.
[J]. NATURE COMMUNICATIONS, 2015, 6

← 1 2 3 4 →