000168203 001__ 168203 000168203 005__ 20250717112645.0 000168203 0247_ $$2doi$$a10.1063/1.4862476 000168203 0247_ $$2ISSN$$a1077-3118 000168203 0247_ $$2ISSN$$a0003-6951 000168203 0247_ $$2WOS$$aWOS:000330839700047 000168203 0247_ $$2openalex$$aopenalex:W1978942823 000168203 037__ $$aDESY-2014-02412 000168203 082__ $$a530 000168203 1001_ $$0P:(DE-HGF)0$$aFognini, A.$$b0$$eCorresponding Author 000168203 245__ $$aUltrafast reduction of the total magnetization in iron 000168203 260__ $$aMelville, NY$$bAmerican Institute of Physics$$c2014 000168203 3367_ $$00$$2EndNote$$aJournal Article 000168203 3367_ $$2DRIVER$$aarticle 000168203 3367_ $$0PUB:(DE-HGF)16$$2PUB:(DE-HGF)$$aJournal Article$$bjournal$$mjournal$$s1426752541_5339 000168203 3367_ $$2BibTeX$$aARTICLE 000168203 500__ $$3POF3_Assignment on 2016-02-15 000168203 500__ $$3POF3_Prefill: G:(DE-HGF)POF3-6212 000168203 520__ $$aSurprisingly, if a ferromagnet is exposed to an ultrafast laser pulse, its apparent magnetization isreduced within less than a picosecond. Up to now, the total magnetization, i.e., the average spinpolarization of the whole valence band, was not detectable on a sub-picosecond time scale. Here,we present experimental data, confirming the ultrafast reduction of the total magnetization. Softx-ray pulses from the free electron laser in Hamburg (FLASH) extract polarized cascadephotoelectrons from an iron layer excited by a femtosecond laser pulse. The spin polarization ofthe emitted electrons is detected by a Mott spin polarimeter. 000168203 536__ $$0G:(DE-H253)POF2-PG2-20130405$$aFLASH Beamline PG2 (POF2-54G16)$$cPOF2-54G16$$fPOF II$$x0 000168203 588__ $$aDataset connected to CrossRef, bib-pubdb1.desy.de 000168203 693__ $$0EXP:(DE-H253)F-PG2-20150101$$1EXP:(DE-H253)FLASH-20150101$$6EXP:(DE-H253)F-PG2-20150101$$aFLASH$$fFLASH Beamline PG2$$x0 000168203 7001_ $$0P:(DE-HGF)0$$aMichlmayr, T. U.$$b1 000168203 7001_ $$0P:(DE-HGF)0$$aSalvatella, G.$$b2 000168203 7001_ $$0P:(DE-HGF)0$$aWetli, C.$$b3 000168203 7001_ $$0P:(DE-HGF)0$$aRamsperger, U.$$b4 000168203 7001_ $$0P:(DE-HGF)0$$aBähler, T.$$b5 000168203 7001_ $$0P:(DE-HGF)0$$aSorgenfrei, F.$$b6 000168203 7001_ $$0P:(DE-HGF)0$$aBeye, M.$$b7 000168203 7001_ $$0P:(DE-HGF)0$$aEschenlohr, A.$$b8 000168203 7001_ $$0P:(DE-HGF)0$$aPontius, N.$$b9 000168203 7001_ $$0P:(DE-HGF)0$$aStamm, C.$$b10 000168203 7001_ $$0P:(DE-H253)PIP1013658$$aHieke, Florian$$b11 000168203 7001_ $$0P:(DE-HGF)0$$aDell'Angela, M.$$b12 000168203 7001_ $$0P:(DE-HGF)0$$aJong, S. de$$b13 000168203 7001_ $$0P:(DE-HGF)0$$aKukreja, R.$$b14 000168203 7001_ $$0P:(DE-H253)PIP1005688$$aGerasimova, Natalia$$b15 000168203 7001_ $$0P:(DE-H253)PIP1000203$$aRybnikov, V.$$b16 000168203 7001_ $$0P:(DE-H253)PIP1010722$$aAl-Shemmary, A.$$b17 000168203 7001_ $$0P:(DE-H253)PIP1003486$$aRedlin, H.$$b18 000168203 7001_ $$0P:(DE-HGF)0$$aRaabe, J.$$b19 000168203 7001_ $$0P:(DE-HGF)0$$aFöhlisch, A.$$b20 000168203 7001_ $$0P:(DE-HGF)0$$aDürr, H. 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