Polarized Neutron Reflectivity Investigation of Periodic Magnetic Rings

Ogrin, F. Y.; Weekes, S. M.; Cubitt, R.; Wildes, A.; Drew, Alan J.; Ross, Caroline A.; Menon, Rajesh; Toperverg, B. P.

doi:10.1109/tmag.2007.893525

Cited by 9 publications

(3 citation statements)

References 10 publications

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“…By taking into account an inevitable misalignment of the external magnetic field with respect to the magnetic hard axis, the magnetic-field dependence can be understood as we describe below. 20,21 Increasing the magnetic field from H = 0 tilts the magnetization away from the easy axis. Consequently, ͉ xy ͉ increases and reaches the maximum when = 45°.…”

Section: Anisotropic Magnetoresistance Effectmentioning

confidence: 99%

Magnetotransport properties in (11¯00)- and (0001)-oriented MnAs films on GaAs substrates

Takagaki

Friedland

2007

Journal of Applied Physics

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Magnetic-field dependence of the resistivities in MnAs͑1100͒ films on GaAs͑001͒ and MnAs͑0001͒ films on GaAs͑111͒B is investigated at low temperatures. Correspondence of the features in the longitudinal and transverse resistivities under reorientations of the magnetization enables us to distinguish the anisotropic magnetoresistance effect from the effects originating from the band structure of MnAs. Simultaneous contributions of holes and electrons are evidenced for the ͑1100͒-oriented films, whereas the transport is almost completely dominated by holes for the ͑0001͒-oriented films. The magnetization flip by an in-plane magnetic field applied along the magnetic easy axis generates jumps in the longitudinal resistivity owing to the magnetoresistance originating from the band-structure effect.

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Section: Anisotropic Magnetoresistance Effectmentioning

confidence: 99%

Magnetotransport properties in (11¯00)- and (0001)-oriented MnAs films on GaAs substrates

Takagaki

Friedland

2007

Journal of Applied Physics

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“…SNP and TAS have been employed to study magnetic ordering in antiferromagnetic crystals (Blanco et al , 2006; Hiess et al , 2001; Hiess et al , 2001; Poole et al , 2007; Zaharko et al , 2006), magnetization distributions (Boehm et al , 2003; Brown et al , 2002), magnetoelectric and multiferroic crystals and films (Brown et al , 2005; Cabrera et al , 2009; Lee et al , 2008; Ratcliff et al , 2011; Tian et al , 2008), and the interplay between magnetism and superconductivity (Chen et al , 2008; Schneider et al , 2006; Wang et al , 2011). The ability of NSFs to analyze the polarization of diffusely reflected neutrons has been applied to magnetic multilayers (Nickel et al , 2001), domain walls in magnetic thin films (Radu et al , 2003, 2005), periodic magnetic rings (Ogrin et al , 2007), and superlattices (Wildes et al , 2008). For SANS, NSFs allow for polarization analysis which has been implemented via SEOP at the NCNR (Gentile et al , 2000; Krycka et al , 2009), and via MEOP at the Hahn-Meitner Institute in Berlin, Germany (Keiderling et al , 2008; Wiedenmann, 2005) and the ILL (Honecker et al , 2010).…”

Section: Neutron Spin-filtersmentioning

confidence: 99%

Optically polarizedHe3

et al. 2017

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This article reviews the physics and technology of producing large quantities of highly spin-polarized 3He nuclei using spin-exchange (SEOP) and metastability-exchange (MEOP) optical pumping. Both technical developments and deeper understanding of the physical processes involved have led to substantial improvements in the capabilities of both methods. For SEOP, the use of spectrally narrowed lasers and K-Rb mixtures has substantially increased the achievable polarization and polarizing rate. For MEOP nearly lossless compression allows for rapid production of polarized 3He and operation in high magnetic fields has likewise significantly increased the pressure at which this method can be performed, and revealed new phenomena. Both methods have benefitted from development of storage methods that allow for spin-relaxation times of hundreds of hours, and specialized precision methods for polarimetry. SEOP and MEOP are now widely applied for spin-polarized targets, neutron spin filters, magnetic resonance imaging, and precision measurements.

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“…SNP and TAS have been employed to study magnetic ordering in antiferromagnetic crystals (Blanco et al, 2006;Poole et al, 2007;Zaharko et al, 2006), magnetization distributions (Boehm et al, 2003;Brown et al, 2002), magnetoelectric and multiferroic crystals and films Cabrera et al, 2009;Lee et al, 2008;Ratcliff et al, 2011;Tian et al, 2008), and the interplay between magnetism and superconductivity (Chen et al, 2008;Schneider et al, 2006;Wang et al, 2011). The ability of NSFs to analyze the polarization of diffusely reflected neutrons has been applied to magnetic multilayers (Nickel et al, 2001), domain walls in magnetic thin films (Radu et al, 2003(Radu et al, , 2005, periodic magnetic rings (Ogrin et al, 2007), and superlattices (Wildes et al, 2008). For SANS, NSFs allow for polarization analysis which has been implemented via SEOP at the NCNR (Gentile et al, 2000;Krycka et al, 2009), and via MEOP at the Hahn-Meitner Institute in Berlin, Germany (Keiderling et al, 2008;Wiedenmann, 2005) and the ILL (Honecker et al, 2010).…”

Section: Brief Summary Of Neutron Scattering Physics Enabledmentioning

confidence: 99%

Optically Polarized $^3$He

Gentile,

Nacher,

Saam

et al. 2016

Preprint

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This article reviews the physics and technology of producing large quantities of highly spin-polarized 3 He nuclei using spin-exchange (SEOP) and metastability-exchange (MEOP) optical pumping. Both technical developments and deeper understanding of the physical processes involved have led to substantial improvements in the capabilities of both methods. For SEOP, the use of spectrally narrowed lasers and K-Rb mixtures has substantially increased the achievable polarization and polarizing rate. For MEOP nearly lossless compression allows for rapid production of polarized 3 He and operation in high magnetic fields has likewise significantly increased the pressure at which this method can be performed, and revealed new phenomena. Both methods have benefitted from development of storage methods that allow for spin-relaxation times of hundreds of hours, and specialized precision methods for polarimetry. SEOP and MEOP are now widely applied for spin-polarized targets, neutron spin filters, magnetic resonance imaging, and precision measurements.

show abstract

Polarized Neutron Reflectivity Investigation of Periodic Magnetic Rings

Cited by 9 publications

References 10 publications

Magnetotransport properties in (11¯00)- and (0001)-oriented MnAs films on GaAs substrates

Magnetotransport properties in (11¯00)- and (0001)-oriented MnAs films on GaAs substrates

Optically polarizedHe3

Optically Polarized $^3$He

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